a-a a-b aaa aab aae aak aam aap ab- aba abb abe abk abm abp aea aeb aee aek aem aep aka akb ake akk akm akp ama amb ame amk amm amp ap- apa apb ape apk apm app b-p baa bab bae bak bam bap bba bbb bbe bbk bbm bbp be- bea beb bee bek bem bep bka bkb bke bkk bkm bkp bma bmb bme bmk bmm bmp bpa bpb bpe bpm bpp eaa eab eae eak eam eap eba ebb ebe ebk ebm ebp eea eeb eee eek eem eep eka ekb eke ekp em- ema emb eme emk emm emp ep- epa epb epe epm epp ka- kaa kab kae kak kam kap kba kbb kbe kbk kbm kbp ke- kea keb kee kek kem kep kkb kke kkk kkm kkp kma kmb kme kmk kmm kmp kpa kpe kpk kpm kpp maa mab mae mak mam map mba mbb mbe mbk mbm mbp mea meb mee mek mem mep mka mkb mke mkk mkm mkp mma mmb mme mmk mmm mmp mpa mpb mpe mpk mpm mpp p-p paa pab pae pak pam pap pba pbb pbe pbk pbm pbp pea peb pee pek pem pep pka pkb pke pkm pkp pma pmb pme pmk pmm pmp ppa ppb ppe ppk ppm ppp