-ic a-a a-b a-c a-i aaa aab aac aai aam aao aap aar ab- aba abb abc abi abm abo abp abr ac- aca acb acc aci acm aco acp acr ai- aia aib aic aii aim aio aip air ama amb amc ami amm amo amp amr aoa aob aoc aoi aom aoo aop aor ap- apa apb apc api apm apo app apr ar- ara arb arc ari arm aro arp arr b-p baa bab bac bai bam bao bap bar bba bbb bbc bbi bbm bbo bbp bbr bca bcb bcc bci bcm bco bcp bcr bi- bia bib bic bii bim bio bip bir bma bmb bmc bmi bmm bmo bmp bmr boa bob boc boi bom boo bop bor bpa bpb bpc bpi bpm bpo bpp bpr bra brb bri brm bro brp brr c-- caa cab cac cai cam cao cap car cba cbb cbc cbi cbm cbo cbp cbr cca ccb ccc cci ccm cco ccp ccr ci- cia cib cic cii cim cio cip cir cma cmb cmc cmi cmm cmo cmp cmr co- coa cob coc coi com coo cop cor cpa cpb cpc cpi cpm cpo cpp cpr cra crb crc cri crm cro crp crr ia- iaa iab iac iai iam iao iap iar iba ibb ibc ibi ibm ibo ibp ibr ica icb icc ici icm ico icp icr iia iib iic iii iim iio iip iir im- ima imb imc imi imm imo imp io- ioa iob ioc ioi iom ioo iop ior ipa ipb ipc ipi ipm ipo ipp ipr ir- ira irb irc iri irm iro irp irr m-o m-r maa mab mac mai mam mao map mar mba mbb mbc mbi mbm mbo mbp mbr mc- mca mcb mcc mci mcm mco mcp mcr mi- mia mib mic mii mim mio mip mir mma mmb mmc mmi mmm mmo mmp mmr moa mob moc moi mom moo mop mor mpa mpb mpc mpi mpm mpo mpp mpr mra mrb mrc mri mrm mro mrp mrr o-i oaa oab oac oai oam oao oap oar ob- oba obb obc obi obm obo obp obr oc- oca ocb occ oci ocm oco ocp ocr oia oib oic oii oim oio oip oir om- oma omb omc omi omm omo omp omr oo- ooa oob ooc ooi oom ooo oop oor op- opa opb opc opi opm opo opp opr or- ora orb orc ori orm oro orp orr p-p paa pab pac pai pam pao pap par pba pbb pbc pbi pbm pbo pbp pbr pca pcb pcc pci pcm pco pcp pcr pia pib pic pii pim pio pip pir pma pmb pmc pmi pmm pmo pmp pmr poa pob poc poi pom poo pop por ppa ppb ppc ppi ppm ppo ppp ppr pra prb prc pri prm pro prp prr ra- raa rab rac rai ram rao rap rar rba rbb rbc rbi rbm rbo rbp rbr rca rcb rcc rci rcm rco rcp rcr ria rib ric rii rim rio rip rir rma rmb rmc rmi rmm rmo rmp rmr roa rob roc roi rom roo rop ror rpa rpb rpc rpi rpm rpo rpp rpr rra rrb rrc rri rrm rrp rrr