-er -ic c-- ccc cce ccg cci ccp ccr cct ce- cec cee ceg cei cep cer cet cgc cge cgg cgi cgp cgr cgt ci- cic cie cig cii cip cir cit cpc cpe cpg cpi cpp cpr cpt crc cre crg cri crp crr crt ctc cte ctg cti ctp ctr ctt ec- ecc ece ecg eci ecr ect eec eee eeg eep eer eet egc ege egg egi egp egr egt eic eie eig eii eip eir eit ep- epc epe epg epi epp epr ept erc ere erg eri erp err ert etc ete etg eti etp etr ett g-p gcc gce gcg gci gcp gcr gct ge- gec gee geg gei gep ger get ggc ggg ggi ggp ggr ggt gic gie gig gii gip gir git gpc gpe gpg gpi gpp gpr gpt grc gre grg gri grp grr grt gtc gte gtg gti gtp gtr gtt icc ice icg ici icp icr ict ie- iec iee ieg iei iep ier iet igc ige igg igi igp igr igt iic iie iii iip iir iit ipc ipe ipg ipi ipp ipr ipt ir- irc ire irg iri irp irr irt itc ite itg iti itp itt p-p pcc pce pcg pci pcp pcr pct pec pee peg pei pep per pet pgc pge pgg pgi pgp pgr pgt pic pie pig pii pip pir pit ppc ppe ppg ppi ppp ppr ppt prc pre prg pri prp prr prt pt- ptc pte ptg pti ptp ptr ptt rcc rce rcg rci rcp rcr rct re- rec ree reg rei rep rer ret rgc rge rgg rgi rgp rgr rgt ric rie rig rii rip rir rit rpc rpe rpg rpi rpp rpr rpt rrc rrg rri rrp rrr rrt rtc rte rtg rti rtp rtr rtt tcc tce tcg tci tcp tcr tct te- tec tee teg tei tep ter tet tgc tge tgg tgi tgp tgr tgt tic tie tig tii tip tir tit tpc tpe tpg tpi tpp tpr tpt trc tre trg tri trp trr trt ttc tte ttg tti ttp ttr ttt