a-a a-b a-i aaa aab aai aam aao aap ab- aba abb abi abm abo abp ai- aia aib aii aim aio aip ama amb ami amm amo amp aoa aob aoi aom aoo aop ap- apa apb api apm apo app b-p baa bab bai bam bao bap bba bbb bbi bbm bbo bbp bi- bia bib bii bim bio bip bma bmb bmi bmm bmo bmp boa bob boi bom boo bop bpa bpb bpi bpm bpo bpp ia- iaa iab iai iam iao iap iba ibb ibi ibm ibo ibp iia iib iii iim iio iip im- ima imb imi imm imo imp io- ioa iob ioi iom ioo iop ipa ipb ipi ipm ipo ipp m-o maa mab mai mam mao map mba mbb mbi mbm mbo mbp mi- mia mib mii mim mio mip mma mmb mmi mmm mmo mmp moa mob moi mom moo mop mpa mpb mpi mpm mpo mpp o-i oaa oab oai oam oao oap ob- oba obb obi obm obo obp oia oib oii oim oio oip om- oma omb omi omm omo omp oo- ooa oob ooi oom ooo oop op- opa opb opi opm opo opp p-p paa pab pai pam pao pap pba pbb pbi pbm pbo pbp pia pib pii pim pio pip pma pmb pmi pmm pmo pmp poa pob poi pom poo pop ppa ppb ppi ppm ppo ppp