a-a a-b a-z aaa aab aak aam aao aap aaz ab- aba abb abk abm abo abp abz aka akb akk akm ako akp ama amb amk amm amo amp amz aoa aob aok aom aoo aop ap- apa apb apk apm apo app az- aza azb azm azo azp azz b-p baa bab bak bam bao bap baz bba bbb bbk bbm bbo bbp bka bkb bkk bkm bko bkp bma bmb bmk bmm bmo bmp bmz boa bob bok bom boo bop boz bpa bpb bpm bpo bpp bza bzo bzp bzz k-z ka- kaa kab kak kam kao kap kaz kba kbb kbk kbm kbo kbp kbz kkb kkk kkm kkp kma kmb kmk kmm kmo kmp kmz koa kob kok kom koo kop koz kpa kpk kpm kpo kpp kzo m-o maa mab mak mam mao map maz mba mbb mbk mbm mbo mbp mka mkb mkk mkm mko mkp mkz mma mmb mmk mmm mmo mmp mmz moa mob mok mom moo mop moz mpa mpb mpk mpm mpo mpp mza mzb mzm mzp oaa oab oak oam oao oap ob- oba obb obk obm obo obp oka okb okk oko okp om- oma omb omm omo omp omz oo- ooa oob ook oom ooo oop op- opa opb opk opm opo opp oza ozm ozo ozz p-p paa pab pak pam pao pap paz pba pbb pbk pbm pbo pbp pbz pka pkb pkm pko pkp pma pmb pmk pmm pmo pmp pmz poa pob pok pom poo pop poz ppa ppb ppk ppm ppo ppp ppz pzk pzm pzp zaa zab zak zam zao zap zaz zbb zbm zka zma zmb zmk zmm zmp zo- zoa zob zok zom zoo zpm zpo zpp zzz