day 8: meow meow

8.rkt

@@ -0,0 +1,56 @@
+#lang curly-fn racket
+
+(require "scripts/aoc.rkt")
+
+;; solution for day 8
+
+(define (follow mapl cur inst)
+  (define node
+    (for/first ([entry (in-list mapl)]
+                #:when (equal? (first entry) cur))
+      entry))
+  (match inst
+    [#\L (second node)]
+    [#\R (third node)]))
+
+(define (part1 input)
+  (for/fold ([cur "AAA"] [cnt 0] #:result cnt)
+            ([inst (in-cycle (in-list (first input)))])
+            #:break (equal? cur "ZZZ")
+    (define next (follow (second input) cur inst))
+    (values next (add1 cnt))))
+
+(define (part2 input)
+  (define all-as
+    (for/list ([x (in-list (second input))] #:when (regexp-match? #px"^..A$" (first x)))
+      (first x)))
+  (define (end-z? c)
+    (regexp-match? #px"^..Z$" c))
+
+  (define (run-item item)
+    (for/fold ([cur item] [cnt 0] #:result cnt)
+              ([inst (in-cycle (in-list (first input)))])
+              #:break (end-z? cur)
+      (define next (follow (second input) cur inst))
+      (values next (add1 cnt))))
+
+  (apply lcm (map run-item all-as)))
+
+
+(define (parse fname)
+  (match-define (list instl mapl) (string-split (file->string fname) "\n\n"))
+  (list (string->list instl)
+        (for/list ([line (in-list (string-split mapl "\n"))])
+          (match-define (pregexp #px"([A-Z0-9]{3}) = .([A-Z0-9]{3}), ([A-Z0-9]{3})."
+                                 (list _ node left right))
+            line)
+          (list node left right))))
+
+; (part2 (parse "inputs/8-test1"))
+; (error)
+
+(module+ main
+  (define input (parse "inputs/8"))
+  (answer 8 1 (time (part1 input)))
+  (answer 8 2 (time (part2 input)))
+  (displayln "meow"))

inputs/8

@@ -0,0 +1,740 @@
+LLRLLRRLRLRRRLRRLLRRRLRLRLRRLRRRLRRLRLRLLRLLLRRRLRRLRRRLRRRLRRRLRLRRLLRRLRRLRRLRRRLRLRRRLLRLRRLRRRLRLRRRLRRRLRLRRRLLRRRLRRRLRLRRLRLRRRLLRRLRRLRRLRRLRLRLRRRLLRRRLRRLRRRLRLRLRRRLLRLRRLLRLRRLRLRRRLRLRRLLRRRLLRRLRLRLLRLLRRLRRLLRRLRLRRLRLRLRRRLRRLRLLLLRRLRLRLRRRLLLRRRLRRLRRLRLLRLRRRLLLRRRLRRRLRRRR
+
+NQT = (TXC, RVJ)
+FPT = (PNS, KJL)
+BNQ = (THG, LCV)
+SPL = (VBH, NNV)
+TLM = (LVQ, PGT)
+GHC = (XKN, SPR)
+PHT = (HMF, DST)
+FSF = (JCM, SMT)
+GDD = (FHJ, RBS)
+GVR = (FVD, FVD)
+SST = (PMF, MGC)
+ZZZ = (VLV, SQV)
+SDV = (DBL, GTL)
+XSP = (GRV, RFM)
+SKG = (NGH, VDX)
+BPK = (RMK, LCQ)
+VSC = (DRN, SFR)
+BFR = (BJR, GMD)
+HTM = (PFM, LVD)
+XVP = (LDP, LDP)
+DRD = (SCH, LKD)
+DSJ = (GSQ, JTN)
+VTS = (BNQ, VFX)
+KVF = (HTP, MQK)
+GPS = (FXQ, TPF)
+VRC = (RTK, RTK)
+HRD = (PMQ, JCR)
+DJK = (FTC, KXH)
+VGJ = (PCJ, TVH)
+QMN = (TLC, HNG)
+DMH = (QSD, PDP)
+CRL = (VFR, MDR)
+XGV = (CMV, FTV)
+XJX = (HTM, HHG)
+SQP = (XKK, KJF)
+PXZ = (JCK, PTH)
+BDV = (JMH, CND)
+FBD = (CQS, QCN)
+TRS = (FGM, NKF)
+TLC = (HBC, FRC)
+DKR = (LCP, VLD)
+GTF = (QHD, PBB)
+NCC = (HJF, LNR)
+KGS = (KPF, GTB)
+CPQ = (SLR, DRD)
+RJQ = (KXK, BFR)
+XSQ = (PNN, NMG)
+DVP = (MBH, QLV)
+CQL = (DVP, VHQ)
+CPV = (MDL, VFB)
+VHV = (CQS, QCN)
+NRD = (KSC, HKX)
+STX = (CGJ, PGK)
+CNP = (FVB, MCN)
+JXT = (DXT, LHK)
+GHG = (MCL, MPB)
+PGK = (RMS, SBC)
+DNH = (FSV, RNS)
+TFZ = (NQT, PBD)
+MBQ = (DPH, FDK)
+SJQ = (JLB, LJJ)
+MBN = (FTD, CDB)
+TDJ = (FJB, PQX)
+DXT = (FJP, HGQ)
+MSG = (MSM, CXN)
+RTK = (GVR, GVR)
+SDX = (VTS, MRG)
+VCX = (QTL, NVV)
+XCS = (KLR, THD)
+RDD = (QDS, JST)
+FVB = (BLD, NPF)
+LVD = (JXC, FQR)
+TMR = (SNJ, DML)
+RCH = (JST, QDS)
+RVJ = (XMN, SDT)
+SQV = (MVP, MKC)
+HDB = (LTL, JJP)
+LVC = (CLL, CLL)
+FGM = (TPG, PHK)
+SCS = (MLK, TKF)
+PRF = (TLB, KTT)
+MPM = (NMN, KGS)
+MGC = (NLT, MGS)
+CNK = (BFR, KXK)
+FXQ = (JMX, LLL)
+GTB = (MFM, PMV)
+VXS = (DPN, FPN)
+NRB = (SCS, SGH)
+QLJ = (NLL, VMM)
+PNN = (SFJ, HSR)
+BRJ = (RMQ, XLJ)
+SNF = (FMH, MNR)
+VLD = (SHN, FBG)
+FSM = (GKF, DBC)
+MHP = (LBX, KQH)
+NSQ = (QKK, KND)
+RRT = (RMK, LCQ)
+BCX = (GTM, MVV)
+XSX = (XFK, XNF)
+TKF = (MFF, VCV)
+HPD = (GHC, RKN)
+MRG = (BNQ, VFX)
+QTK = (QRT, RRB)
+HFF = (NKD, SXP)
+MFM = (BRB, DDN)
+VVL = (GPC, BRJ)
+CST = (GQT, NLG)
+THD = (MVK, DRJ)
+XFN = (JNC, MNF)
+NKH = (PMD, BDV)
+NLT = (HKK, KCD)
+VXR = (XCS, GRX)
+SDS = (JBV, JFM)
+BFM = (XXG, CHQ)
+PMD = (JMH, CND)
+VVF = (GQT, NLG)
+FGG = (NRD, SNP)
+LKD = (NGK, SQP)
+RSV = (TXL, GPD)
+LNR = (RDB, NTD)
+RPL = (SNB, MHK)
+CCG = (JDT, PJD)
+TKR = (TMD, VCL)
+DRJ = (CQL, XFH)
+JFM = (MMV, GPS)
+FJP = (BDM, QXN)
+QJS = (BFM, RHM)
+KTT = (PXV, VJV)
+XXB = (VKG, HXL)
+RMK = (DBR, HFQ)
+NGK = (KJF, XKK)
+NPF = (SMK, BTJ)
+RBS = (PGN, GNH)
+PNS = (VTJ, KSM)
+BCK = (SDX, NRF)
+RNS = (XVS, KFX)
+PDB = (BHH, BHH)
+GMQ = (MRD, JRG)
+DGM = (HDV, GSD)
+TLB = (PXV, VJV)
+QRT = (FRS, FFT)
+VSX = (NLL, VMM)
+GSQ = (JRJ, LGV)
+TXC = (XMN, SDT)
+HGQ = (QXN, BDM)
+PMQ = (KBB, NRH)
+KRC = (DGM, XCR)
+QLZ = (TKM, HTF)
+NJM = (GPC, BRJ)
+FRG = (QLS, GXP)
+NMG = (SFJ, HSR)
+JDT = (TDF, QHT)
+LFC = (RFM, GRV)
+TXL = (XSX, FTP)
+DKG = (JNL, XBR)
+VKF = (GTM, MVV)
+VQV = (RHT, SDS)
+SJH = (LPV, TRQ)
+KSM = (LHX, CPQ)
+QMH = (MMD, GPB)
+VNP = (TRQ, LPV)
+NBM = (JPF, KRM)
+RGQ = (TMH, KQR)
+RSM = (SMP, KSG)
+HDV = (VXS, VQG)
+TTD = (CDB, FTD)
+GXF = (SLN, SCF)
+QHT = (TMR, QTH)
+MNR = (VXR, GDS)
+GSA = (THS, NKH)
+XKN = (GNB, VLQ)
+HHQ = (RRB, QRT)
+CLC = (THS, NKH)
+BSN = (QKN, QKN)
+QRB = (KDT, JSL)
+JCX = (VCX, DXP)
+BDM = (SQN, TBH)
+GQT = (DNB, NTS)
+QSF = (KXH, FTC)
+HFQ = (NNQ, LLM)
+VFB = (NGF, NXB)
+JMX = (HFB, DNR)
+VKS = (NBM, NQF)
+PGN = (FBD, VHV)
+PNQ = (KQR, TMH)
+QLM = (VVL, NJM)
+PRB = (KQD, QRB)
+GTL = (VQJ, DJR)
+KNL = (JRN, KVF)
+VMT = (LTL, JJP)
+QKN = (PHM, VQS)
+QBL = (LXK, PRF)
+PCT = (VNP, SJH)
+QLV = (HXF, DXH)
+HNN = (DSJ, XDN)
+LGV = (VVD, XXB)
+XCB = (XXQ, CHX)
+GXC = (FGG, MSX)
+SLN = (VLP, SST)
+NQQ = (SXP, NKD)
+DRN = (DPC, TCV)
+JHF = (QTK, HHQ)
+GPM = (GTF, NCX)
+PFM = (JXC, JXC)
+KBT = (KQH, LBX)
+XFH = (VHQ, DVP)
+CPT = (VSD, TKR)
+GSX = (CTF, XXX)
+SPR = (GNB, VLQ)
+XBP = (MXH, TBJ)
+VKG = (PKS, CPT)
+THG = (FRP, FRP)
+SHN = (FRG, TCF)
+BFS = (RPL, JRV)
+PHK = (BQG, BMH)
+SMK = (VRV, FDG)
+PBF = (MSG, XGT)
+NKF = (TPG, PHK)
+VDQ = (MHP, KBT)
+JRG = (DXJ, JCX)
+MHK = (QTS, CRL)
+CXN = (FBR, FCT)
+DHT = (XXQ, CHX)
+DML = (SPL, TBX)
+BTJ = (FDG, VRV)
+KVG = (TJJ, TRS)
+JPH = (CLC, DXZ)
+HXL = (PKS, CPT)
+RDB = (PKM, FLG)
+CTF = (NLX, SJQ)
+BMH = (GVP, NSQ)
+GTP = (NMG, PNN)
+KJL = (KSM, VTJ)
+SLR = (LKD, SCH)
+TJJ = (NKF, FGM)
+DPH = (HHT, NRB)
+PBN = (CLC, CLC)
+FFT = (DJK, QSF)
+RTL = (TBJ, MXH)
+PJD = (TDF, QHT)
+HTP = (BGK, NCC)
+MDL = (NXB, NGF)
+CGJ = (SBC, RMS)
+RTR = (LHK, DXT)
+MLR = (JNC, MNF)
+DXL = (RKN, GHC)
+QTS = (VFR, MDR)
+LLM = (KSK, BHN)
+FFJ = (HGD, HGD)
+PQX = (VRC, KXG)
+XFK = (QNM, TMC)
+FVD = (HTF, TKM)
+CSR = (XDN, DSJ)
+VPN = (DPH, FDK)
+TJN = (HGC, HJH)
+KSC = (SVX, SVX)
+TLH = (FSV, RNS)
+QTH = (DML, SNJ)
+VQJ = (SMR, KCL)
+GNP = (JRQ, GBR)
+TKB = (TLC, HNG)
+FBV = (BFM, RHM)
+DMS = (BTG, NXV)
+VDX = (BCM, RNG)
+MSN = (QTK, HHQ)
+TKM = (LSM, PBF)
+FSS = (MCN, FVB)
+DLA = (PHM, VQS)
+LXK = (KTT, TLB)
+JBV = (MMV, GPS)
+FFQ = (QJS, FBV)
+MXH = (RPP, LKF)
+RKN = (SPR, XKN)
+FDG = (RSC, QMH)
+NLL = (VKS, FPF)
+XDN = (JTN, GSQ)
+FLS = (JNL, XBR)
+MLA = (PTH, JCK)
+GTM = (FSS, CNP)
+NVV = (LLR, NLV)
+TBX = (VBH, NNV)
+HTG = (VDQ, GFH)
+VLQ = (HXR, QNQ)
+JSL = (MVC, DJM)
+BPX = (VVL, NJM)
+FBG = (FRG, TCF)
+PFS = (HMH, KFF)
+GPB = (DDH, RSM)
+JFB = (FXX, GXC)
+XJZ = (VQS, PHM)
+FRS = (QSF, DJK)
+NKP = (PDB, SGT)
+KSB = (CTF, XXX)
+DTL = (FMH, MNR)
+HSN = (PBN, JPH)
+JCQ = (XCB, DHT)
+GBR = (NKP, GHV)
+BKL = (CKM, XJX)
+JLH = (XGV, MXR)
+TBJ = (LKF, RPP)
+RSJ = (HVN, KKH)
+SVX = (BSN, BSN)
+GRV = (CHT, NMV)
+TKX = (RHT, SDS)
+MQK = (BGK, NCC)
+KLR = (DRJ, MVK)
+NCH = (BCX, VKF)
+NLX = (JLB, LJJ)
+VHQ = (MBH, QLV)
+QXR = (NCH, FRT)
+FQS = (VGJ, HFG)
+LCP = (SHN, FBG)
+NCX = (QHD, PBB)
+SXK = (HGD, ZZZ)
+RNR = (RTR, JXT)
+VQG = (FPN, DPN)
+RMJ = (HNN, CSR)
+KSL = (BCK, QQJ)
+HCK = (QMN, TKB)
+LBX = (HFD, XQH)
+MTL = (NCH, FRT)
+XHR = (KFL, TLM)
+LLH = (LFC, XSP)
+JRJ = (XXB, VVD)
+KGM = (FQS, KGC)
+SDT = (MNQ, GTN)
+GJQ = (KLG, DMS)
+RNG = (RNR, GHB)
+DCK = (TXL, GPD)
+DXJ = (DXP, VCX)
+SNP = (KSC, HKX)
+KRS = (BMQ, GBP)
+GPC = (RMQ, XLJ)
+CDB = (MXQ, XLM)
+NLV = (FGS, KNL)
+GNB = (HXR, QNQ)
+KFL = (PGT, LVQ)
+HQL = (QXR, MTL)
+BJR = (PBH, PHT)
+QTL = (LLR, NLV)
+SNB = (CRL, QTS)
+LDP = (PBN, PBN)
+DFJ = (FHJ, RBS)
+JJP = (XMJ, VVQ)
+GQC = (QRB, KQD)
+SFR = (DPC, TCV)
+MPB = (FSM, GGL)
+SXP = (QFP, GFQ)
+MNF = (DKG, FLS)
+KLG = (NXV, BTG)
+TVH = (JFB, PJJ)
+SHJ = (SFX, TMT)
+RHF = (SRD, KBV)
+XBR = (NQQ, HFF)
+PBD = (RVJ, TXC)
+XXQ = (KSL, DDL)
+FTP = (XNF, XFK)
+HBC = (JTF, LLH)
+BTG = (HDB, VMT)
+KFX = (DMH, GBM)
+SGH = (MLK, TKF)
+CVS = (GBP, BMQ)
+DDL = (BCK, QQJ)
+PKM = (QNV, DPJ)
+QSR = (KJL, PNS)
+KPD = (PCT, MCP)
+BHH = (LVC, LVC)
+MDR = (HTG, SFD)
+HKK = (DXL, HPD)
+SMD = (RCQ, NJD)
+XMJ = (MKM, NTN)
+CQS = (DNH, TLH)
+PBH = (HMF, DST)
+MKC = (CJH, JDQ)
+KLL = (FJB, PQX)
+CXP = (VGS, HFX)
+JPF = (STX, BXV)
+CRV = (RCQ, NJD)
+FDK = (NRB, HHT)
+BTT = (CRV, SMD)
+RHT = (JBV, JFM)
+MXR = (FTV, CMV)
+DBL = (DJR, VQJ)
+CHX = (DDL, KSL)
+JKX = (VDX, NGH)
+MQA = (HTF, TKM)
+DJQ = (DLT, SBS)
+VFR = (SFD, HTG)
+NMN = (KPF, GTB)
+JNK = (VNQ, TPT)
+KJH = (GTF, NCX)
+QLS = (GXF, SCK)
+NHR = (PNQ, RGQ)
+FPF = (NBM, NQF)
+BKP = (KLL, TDJ)
+SBC = (TTF, SSS)
+XMN = (GTN, MNQ)
+PBB = (RRT, BPK)
+XVS = (GBM, DMH)
+HFX = (MPN, JLH)
+KDS = (TXG, DBT)
+DDN = (GDD, DFJ)
+SSS = (CST, VVF)
+NGH = (RNG, BCM)
+HNG = (HBC, FRC)
+CND = (RCH, RDD)
+HFD = (NHR, RDV)
+FRC = (JTF, LLH)
+TBH = (KDS, CNQ)
+QNQ = (TFB, KGM)
+SMT = (MBK, TJN)
+NGF = (BPV, JNR)
+XLM = (XVP, QCK)
+JLB = (SNF, DTL)
+NXV = (HDB, VMT)
+VSD = (TMD, VCL)
+TMT = (GHG, PVG)
+NNV = (JKX, SKG)
+HFB = (QQK, BKP)
+BLD = (SMK, BTJ)
+JGH = (TKB, QMN)
+XXX = (NLX, SJQ)
+LQH = (VLD, LCP)
+KRM = (BXV, STX)
+HVN = (FTH, QBL)
+QXM = (KLG, DMS)
+DBR = (LLM, NNQ)
+MVP = (CJH, JDQ)
+FBR = (MBQ, VPN)
+SFP = (HRD, SGC)
+HGD = (SQV, VLV)
+CJH = (JNK, DXR)
+DJM = (XSQ, GTP)
+KXG = (RTK, RKV)
+HTF = (LSM, PBF)
+FXX = (MSX, FGG)
+MFF = (VSC, QCP)
+TMH = (HQL, GSJ)
+KBB = (CHN, FSF)
+XTV = (SBH, SGR)
+MFH = (JGH, HCK)
+SGC = (JCR, PMQ)
+TRQ = (LVM, FFQ)
+VCL = (DXK, RBD)
+QSD = (VQF, JCQ)
+FQR = (FFJ, SXK)
+KQD = (KDT, JSL)
+XLJ = (DCG, MPM)
+FXL = (TFF, SSP)
+RRN = (DBL, GTL)
+CKM = (HTM, HHG)
+VLP = (MGC, PMF)
+KPQ = (MDL, VFB)
+XQH = (RDV, NHR)
+JRN = (MQK, HTP)
+JMH = (RCH, RDD)
+JRV = (SNB, MHK)
+QCP = (DRN, SFR)
+LLR = (KNL, FGS)
+NMV = (DLJ, DJQ)
+KBV = (GQC, PRB)
+JXC = (FFJ, FFJ)
+LFS = (MHB, VXT)
+DST = (XHR, PCS)
+SNJ = (TBX, SPL)
+KND = (FDH, CCG)
+CMT = (KPK, RMJ)
+HHG = (PFM, LVD)
+RPP = (MBN, TTD)
+MBK = (HJH, HGC)
+NQF = (JPF, KRM)
+FPN = (BFS, RVB)
+GFQ = (RTL, XBP)
+SCH = (NGK, SQP)
+VFX = (THG, LCV)
+CTG = (TMT, SFX)
+PGT = (CMT, RFB)
+RLB = (TFF, SSP)
+STD = (SJT, TFZ)
+VMM = (FPF, VKS)
+SFX = (GHG, PVG)
+BXV = (CGJ, PGK)
+FBT = (TBM, RHF)
+LJJ = (SNF, DTL)
+LKF = (MBN, TTD)
+QNV = (KRC, VMF)
+VGS = (MPN, JLH)
+MKM = (JJD, BKL)
+HKX = (SVX, RKF)
+MSL = (CRV, SMD)
+RHM = (CHQ, XXG)
+FRP = (MSF, MSF)
+VCV = (VSC, QCP)
+FMH = (VXR, GDS)
+FLR = (VGS, HFX)
+GHV = (PDB, SGT)
+FHQ = (MRD, JRG)
+HJF = (RDB, NTD)
+MSM = (FBR, FCT)
+GHB = (JXT, RTR)
+BMQ = (MFH, GTR)
+MCP = (VNP, SJH)
+SRD = (PRB, GQC)
+DXR = (TPT, VNQ)
+RFB = (KPK, RMJ)
+GSJ = (MTL, QXR)
+FHJ = (PGN, GNH)
+LCQ = (DBR, HFQ)
+GBM = (PDP, QSD)
+TPT = (JHF, MSN)
+MVV = (CNP, FSS)
+KXD = (LQH, DKR)
+PXV = (QXM, GJQ)
+BHN = (KPQ, CPV)
+SBS = (RRN, SDV)
+LHX = (SLR, DRD)
+TBM = (KBV, SRD)
+DXK = (PLP, FGX)
+NKD = (QFP, GFQ)
+PVG = (MCL, MPB)
+TTF = (VVF, CST)
+PDP = (VQF, JCQ)
+MSX = (NRD, SNP)
+CMV = (RSV, DCK)
+PMF = (NLT, MGS)
+MSF = (SJT, SJT)
+NTC = (DKR, LQH)
+GNH = (VHV, FBD)
+GSD = (VQG, VXS)
+VBH = (JKX, SKG)
+GTR = (JGH, HCK)
+SSL = (MHB, VXT)
+NLG = (NTS, DNB)
+JRQ = (NKP, GHV)
+MLK = (MFF, VCV)
+BLF = (HRD, SGC)
+BGK = (HJF, LNR)
+VQF = (XCB, DHT)
+GVP = (QKK, KND)
+FTD = (MXQ, XLM)
+JST = (JFC, KVG)
+JFC = (TJJ, TRS)
+MMD = (DDH, RSM)
+SBH = (TKX, VQV)
+PDH = (CVS, KRS)
+NRH = (CHN, FSF)
+MRD = (JCX, DXJ)
+KGC = (VGJ, HFG)
+RRB = (FFT, FRS)
+KQR = (GSJ, HQL)
+FSV = (XVS, KFX)
+DBC = (PSR, QXX)
+GMR = (KKH, HVN)
+CLG = (CLL, PXZ)
+JNL = (HFF, NQQ)
+JCR = (KBB, NRH)
+FTV = (DCK, RSV)
+DPC = (FHQ, GMQ)
+MVC = (XSQ, GTP)
+KXK = (GMD, BJR)
+DPJ = (KRC, VMF)
+FTC = (GSX, KSB)
+TBK = (QKN, XJZ)
+VFG = (SHJ, CTG)
+VXT = (QLJ, VSX)
+MHB = (VSX, QLJ)
+MMV = (TPF, FXQ)
+QCN = (DNH, TLH)
+KPK = (CSR, HNN)
+RDV = (PNQ, RGQ)
+DCG = (KGS, NMN)
+FJB = (VRC, KXG)
+NTD = (PKM, FLG)
+DBT = (GPM, KJH)
+LLL = (HFB, DNR)
+SMR = (BPX, QLM)
+MGS = (HKK, KCD)
+HHT = (SCS, SGH)
+MVK = (CQL, XFH)
+GFH = (KBT, MHP)
+JNC = (FLS, DKG)
+QHD = (RRT, BPK)
+NTN = (BKL, JJD)
+VQS = (CNK, RJQ)
+KQH = (XQH, HFD)
+GGL = (DBC, GKF)
+QQK = (KLL, TDJ)
+LHK = (HGQ, FJP)
+RKV = (GVR, PLT)
+VKV = (TBM, RHF)
+MPN = (XGV, MXR)
+PHM = (RJQ, CNK)
+TPG = (BQG, BMH)
+CLL = (PTH, JCK)
+MXQ = (XVP, QCK)
+NXB = (BPV, JNR)
+GTN = (PFS, HGV)
+FRT = (VKF, BCX)
+GRX = (THD, KLR)
+VLV = (MVP, MKC)
+NJD = (QBX, XTV)
+VJV = (QXM, GJQ)
+KPF = (MFM, PMV)
+JCM = (TJN, MBK)
+HFG = (TVH, PCJ)
+HJH = (QNB, PDH)
+JTN = (JRJ, LGV)
+CHQ = (XFN, MLR)
+JNR = (TXN, KPD)
+BCM = (RNR, GHB)
+PCS = (TLM, KFL)
+DXP = (QTL, NVV)
+KJF = (NTC, KXD)
+DLT = (RRN, SDV)
+QXN = (TBH, SQN)
+TMC = (FBT, VKV)
+PJJ = (GXC, FXX)
+KXH = (KSB, GSX)
+GDS = (XCS, GRX)
+BQG = (GVP, NSQ)
+XNF = (TMC, QNM)
+RFM = (CHT, NMV)
+JDQ = (JNK, DXR)
+LKP = (MSF, STD)
+TFB = (FQS, KGC)
+DNR = (BKP, QQK)
+FGX = (FPT, QSR)
+HXR = (KGM, TFB)
+XKK = (NTC, KXD)
+FDH = (JDT, PJD)
+FTH = (PRF, LXK)
+TCF = (GXP, QLS)
+TXN = (PCT, MCP)
+TPF = (LLL, JMX)
+LPV = (LVM, FFQ)
+HXF = (FXL, RLB)
+HGV = (KFF, HMH)
+MCN = (BLD, NPF)
+SMP = (BTT, MSL)
+LVM = (FBV, QJS)
+TCV = (GMQ, FHQ)
+FLG = (DPJ, QNV)
+PTH = (LFS, SSL)
+SQS = (SHJ, CTG)
+GBP = (MFH, GTR)
+QCK = (LDP, HSN)
+JCK = (LFS, SSL)
+TNL = (LVC, CLG)
+GKF = (QXX, PSR)
+PCJ = (PJJ, JFB)
+MBH = (DXH, HXF)
+PLP = (FPT, QSR)
+VXQ = (JRQ, GBR)
+DDH = (KSG, SMP)
+PKS = (TKR, VSD)
+JRT = (CXP, FLR)
+HMH = (SQS, VFG)
+DNB = (JRT, BRM)
+BRB = (DFJ, GDD)
+PSR = (SFP, BLF)
+KSK = (KPQ, CPV)
+QXX = (BLF, SFP)
+SSP = (GMR, RSJ)
+VMF = (DGM, XCR)
+MNQ = (PFS, HGV)
+HSR = (VXQ, GNP)
+KSG = (MSL, BTT)
+VRV = (RSC, QMH)
+XXG = (MLR, XFN)
+RVB = (JRV, RPL)
+KDT = (MVC, DJM)
+SQN = (CNQ, KDS)
+BPV = (TXN, KPD)
+SJT = (PBD, NQT)
+LCV = (FRP, LKP)
+CNQ = (TXG, DBT)
+GPD = (FTP, XSX)
+CHN = (SMT, JCM)
+XGT = (MSM, CXN)
+TFF = (GMR, RSJ)
+QKK = (FDH, CCG)
+CHT = (DLJ, DJQ)
+BRM = (CXP, FLR)
+KFF = (VFG, SQS)
+FGS = (KVF, JRN)
+SFD = (GFH, VDQ)
+RMQ = (MPM, DCG)
+AAA = (SQV, VLV)
+JJD = (XJX, CKM)
+VVD = (HXL, VKG)
+SCF = (VLP, SST)
+RKF = (BSN, TBK)
+LVQ = (CMT, RFB)
+SCK = (SCF, SLN)
+TXG = (GPM, KJH)
+DXZ = (NKH, THS)
+HMF = (PCS, XHR)
+KKH = (QBL, FTH)
+THS = (PMD, BDV)
+FCT = (MBQ, VPN)
+VVQ = (MKM, NTN)
+QNM = (VKV, FBT)
+LTL = (XMJ, VVQ)
+TDF = (QTH, TMR)
+VNQ = (JHF, MSN)
+KCL = (QLM, BPX)
+RMS = (TTF, SSS)
+HGC = (QNB, PDH)
+JTF = (LFC, XSP)
+PMV = (DDN, BRB)
+VTJ = (CPQ, LHX)
+NNQ = (BHN, KSK)
+NRF = (VTS, MRG)
+QNB = (KRS, CVS)
+RCQ = (QBX, XTV)
+MCL = (FSM, GGL)
+NTS = (JRT, BRM)
+QQJ = (NRF, SDX)
+QFP = (XBP, RTL)
+DPN = (BFS, RVB)
+XCR = (HDV, GSD)
+SGT = (BHH, TNL)
+JGA = (PBD, NQT)
+LSM = (XGT, MSG)
+PLT = (FVD, QLZ)
+RSC = (MMD, GPB)
+DXH = (RLB, FXL)
+TMD = (DXK, RBD)
+QDS = (JFC, KVG)
+KCD = (DXL, HPD)
+GMD = (PHT, PBH)
+DLJ = (DLT, SBS)
+DJR = (SMR, KCL)
+SGR = (VQV, TKX)
+RBD = (FGX, PLP)
+SFJ = (GNP, VXQ)
+GXP = (SCK, GXF)
+QBX = (SBH, SGR)

inputs/8-test1

@@ -0,0 +1,10 @@
+LR
+
+11A = (11B, XXX)
+11B = (XXX, 11Z)
+11Z = (11B, XXX)
+22A = (22B, XXX)
+22B = (22C, 22C)
+22C = (22Z, 22Z)
+22Z = (22B, 22B)
+XXX = (XXX, XXX)