a-a a-b a-i aaa aab aae aai aam aan aap ab- aba abb abe abi abm abn abp aea aeb aee aei aem aen aep ai- aia aib aie aii aim ain aip ama amb ame ami amm amn amp an- ana anb ane ani anm ann anp ap- apa apb ape api apm apn app b-p baa bab bae bai bam ban bap bba bbb bbe bbi bbm bbn bbp be- bea beb bee bei bem ben bep bi- bia bib bie bii bim bin bip bma bmb bme bmi bmm bmn bmp bna bnb bne bni bnn bnp bpa bpb bpe bpi bpm bpn bpp eaa eab eae eai eam ean eap eba ebb ebe ebi ebm ebn ebp eea eeb eee eem een eep eia eib eie eii eim ein eip em- ema emb eme emi emm emn emp en- ena enb ene eni enm enn enp ep- epa epb epe epi epm epn epp ia- iaa iab iae iai iam ian iap iba ibb ibe ibi ibm ibn ibp ie- iea iee iei iem ien iep iia iib iie iii iim iin iip im- ima imb ime imi imm imn imp in- ina inb ine ini inm inn inp ipa ipb ipe ipi ipm ipn ipp maa mab mae mai mam man map mba mbb mbe mbi mbm mbp mea meb mee mei mem men mep mi- mia mib mie mii mim min mip mma mmb mme mmi mmm mmn mmp mna mnb mne mni mnm mnn mnp mpa mpb mpe mpi mpm mpn mpp n-i naa nab nae nai nam nan nap nba nbb nbe nbi nbm nbn nbp ne- nea neb nee nei nem nen nep nia nib nie nii nim nin nip nma nmb nme nmi nmm nmn nmp nna nnb nne nni nnm nnn nnp npa npb npe npi npm npn npp p-p paa pab pae pai pam pan pap pba pbb pbe pbi pbm pbn pbp pea peb pee pei pem pen pep pia pib pie pii pim pin pip pma pmb pme pmi pmm pmn pmp pn- pna pnb pne pni pnm pnn pnp ppa ppb ppe ppi ppm ppn ppp