-ic a-a a-b a-c a-i aaa aab aac aag aai aao aap aar ab- aba abb abc abg abi abo abp abr ac- aca acb acc acg aci aco acp acr ag- aga agb agc agg agi ago agp agr ai- aia aib aic aig aii aio aip air aoa aob aoc aog aoi aoo aop aor ap- apa apb apc apg api apo app apr ar- ara arb arc arg ari aro arp arr b-p baa bab bac bag bai bao bap bar bba bbb bbc bbg bbi bbo bbp bbr bca bcb bcc bcg bci bco bcp bcr bga bgb bgc bgg bgi bgo bgp bgr bi- bia bib bic big bii bio bip bir boa bob boc bog boi boo bop bor bpa bpb bpc bpg bpi bpo bpp bpr bra brb brg bri bro brp brr c-- caa cab cac cag cai cao cap car cba cbb cbc cbg cbi cbo cbp cbr cca ccb ccc ccg cci cco ccp ccr cga cgb cgc cgg cgi cgo cgp cgr ci- cia cib cic cig cii cio cip cir co- coa cob coc cog coi coo cop cor cpa cpb cpc cpg cpi cpo cpp cpr cra crb crc crg cri cro crp crr g-p gaa gab gac gag gai gao gap gar gba gbc gbg gbi gbo gbp gbr gca gcb gcc gcg gci gco gcp gcr gga ggb ggc ggg ggi ggo ggp ggr gia gib gic gig gii gio gip gir goa gob goc gog goi goo gop gor gpa gpb gpc gpg gpi gpo gpp gpr gra grb grc grg gri gro grp grr ia- iaa iab iac iag iai iao iap iar iba ibb ibc ibg ibi ibo ibp ibr ica icb icc icg ici ico icp icr iga igb igc igg igi igo igp igr iia iib iic iii iio iip iir io- ioa iob ioc iog ioi ioo iop ior ipa ipb ipc ipg ipi ipo ipp ipr ir- ira irb irc irg iri iro irp irr o-i oaa oab oac oag oai oao oap oar ob- oba obb obc obg obi obo obp obr oc- oca ocb occ ocg oci oco ocp ocr oga ogc ogg ogi ogo ogp oia oib oic oii oio oip oir oo- ooa oob ooc oog ooi ooo oop oor op- opa opb opc opg opi opo opp opr or- ora orb orc org ori oro orp orr p-p paa pab pac pag pai pao pap par pba pbb pbc pbg pbi pbo pbp pbr pca pcb pcc pcg pci pco pcp pcr pga pgb pgc pgg pgi pgo pgp pgr pia pib pic pig pii pio pip pir poa pob poc pog poi poo pop por ppa ppb ppc ppg ppi ppo ppp ppr pra prb prc prg pri pro prp prr ra- raa rab rac rag rai rao rap rar rba rbb rbc rbg rbi rbo rbp rbr rca rcb rcc rcg rci rco rcp rcr rga rgb rgc rgg rgi rgo rgp rgr ria rib ric rig rii rio rip rir roa rob roc rog roi roo rop ror rpa rpb rpc rpg rpi rpo rpp rpr rra rrb rrc rrg rri rrp rrr