a-a a-b aaa aab aae aak aam aan aap ab- aba abb abe abk abm abn abp aea aeb aee aek aem aen aep aka akb ake akk akm akn akp ama amb ame amk amm amn amp an- ana anb ane ank anm ann anp ap- apa apb ape apk apm apn app b-p baa bab bae bak bam ban bap bba bbb bbe bbk bbm bbn bbp be- bea beb bee bek bem ben bep bka bkb bke bkk bkm bkn bkp bma bmb bme bmk bmm bmn bmp bna bnb bne bnk bnn bnp bpa bpb bpe bpm bpn bpp eaa eab eae eak eam ean eap eba ebb ebe ebk ebm ebn ebp eea eeb eee eek eem een eep eka ekb eke ekp em- ema emb eme emk emm emn emp en- ena enb ene enk enm enn enp ep- epa epb epe epm epn epp ka- kaa kab kae kak kam kan kap kba kbb kbe kbk kbm kbn kbp ke- kea keb kee kek kem ken kep kkb kke kkk kkm kkn kkp kma kmb kme kmk kmm kmp kn- kna kne knk knm knn knp kpa kpe kpk kpm kpn kpp maa mab mae mak mam man map mba mbb mbe mbk mbm mbp mea meb mee mek mem men mep mka mkb mke mkk mkm mkn mkp mma mmb mme mmk mmm mmn mmp mna mnb mne mnk mnm mnn mnp mpa mpb mpe mpk mpm mpn mpp naa nab nae nak nam nan nap nba nbb nbe nbk nbm nbn nbp ne- nea neb nee nek nem nen nep nka nke nkk nkm nkn nkp nma nmb nme nmk nmm nmn nmp nna nnb nne nnk nnm nnn nnp npa npb npe npm npn npp p-p paa pab pae pak pam pan pap pba pbb pbe pbk pbm pbn pbp pea peb pee pek pem pen pep pka pkb pke pkm pkn pkp pma pmb pme pmk pmm pmn pmp pn- pna pnb pne pnk pnm pnn pnp ppa ppb ppe ppk ppm ppn ppp