a-a a-b a-c aaa aab aac aah aam aao aap ab- aba abb abc abh abm abo abp ac- aca acb acc ach acm aco acp aha ahb ahc ahh ahm aho ahp ama amb amc amh amm amo amp aoa aob aoc aoh aom aoo aop ap- apa apb apc aph apm apo app b-p baa bab bac bah bam bao bap bba bbb bbc bbh bbm bbo bbp bca bcb bcc bch bcm bco bcp bha bhb bhc bhh bhm bho bhp bma bmb bmc bmh bmm bmo bmp boa bob boc boh bom boo bop bpa bpb bpc bph bpm bpo bpp c-- caa cab cac cah cam cao cap cba cbb cbc cbh cbm cbo cbp cca ccb ccc cch ccm cco ccp ch- cha chb chc chh chm cho chp cma cmb cmc cmh cmm cmo cmp co- coa cob coc coh com coo cop cpa cpb cpc cph cpm cpo cpp haa hab hac hah ham hao hap hba hbb hbc hbh hbm hbo hbp hca hcb hcc hch hcm hco hcp hha hhb hhc hhh hhm hho hhp hma hmb hmc hmh hmm hmo hmp hoa hob hoc hoh hom hoo hop hpa hpb hpc hph hpm hpo hpp m-o maa mab mac mah mam mao map mba mbb mbc mbh mbm mbo mbp mc- mca mcb mcc mch mcm mco mcp mha mhc mhh mhm mho mhp mma mmb mmc mmh mmm mmo mmp moa mob moc moh mom moo mop mpa mpb mpc mph mpm mpo mpp oaa oab oac oah oam oao oap ob- oba obb obc obh obm obo obp oc- oca ocb occ och ocm oco ocp oha ohc ohh ohm oho ohp om- oma omb omc omh omm omo omp oo- ooa oob ooc ooh oom ooo oop op- opa opb opc oph opm opo opp p-p paa pab pac pah pam pao pap pba pbb pbc pbm pbo pbp pca pcb pcc pch pcm pco pcp pha phb phc phm pho php pma pmb pmc pmh pmm pmo pmp poa pob poc poh pom poo pop ppa ppb ppc pph ppm ppo ppp