a-a a-b a-i aaa aab aae aai aam aap ab- aba abb abe abi abm abp aea aeb aee aei aem aep ai- aia aib aie aii aim aip ama amb ame ami amm amp ap- apa apb ape api apm app b-p baa bab bae bai bam bap bba bbb bbe bbi bbm bbp be- bea beb bee bei bem bep bi- bia bib bie bii bim bip bma bmb bme bmi bmm bmp bpa bpb bpe bpi bpm bpp eaa eab eae eai eam eap eba ebb ebe ebi ebm ebp eea eeb eee eem eep eia eib eie eii eim eip em- ema emb eme emi emm emp ep- epa epb epe epi epm epp ia- iaa iab iae iai iam iap iba ibb ibe ibi ibm ibp ie- iea iee iei iem iep iia iib iie iii iim iip im- ima imb ime imi imm imp ipa ipb ipe ipi ipm ipp maa mab mae mai mam map mba mbb mbe mbi mbm mbp mea meb mee mei mem mep mi- mia mib mie mii mim mip mma mmb mme mmi mmm mmp mpa mpb mpe mpi mpm mpp p-p paa pab pae pai pam pap pba pbb pbe pbi pbm pbp pea peb pee pei pem pep pia pib pie pii pim pip pma pmb pme pmi pmm pmp ppa ppb ppe ppi ppm ppp