a-a a-b a-i aaa aab aai aam aan aap ab- aba abb abi abm abn abp ai- aia aib aii aim ain aip ama amb ami amm amn amp an- ana anb ani anm ann anp ap- apa apb api apm apn app b-p baa bab bai bam ban bap bba bbb bbi bbm bbn bbp bi- bia bib bii bim bin bip bma bmb bmi bmm bmn bmp bna bnb bni bnn bnp bpa bpb bpi bpm bpn bpp ia- iaa iab iai iam ian iap iba ibb ibi ibm ibn ibp iia iib iii iim iin iip im- ima imb imi imm imn imp in- ina inb ini inm inn inp ipa ipb ipi ipm ipn ipp maa mab mai mam man map mba mbb mbi mbm mbp mi- mia mib mii mim min mip mma mmb mmi mmm mmn mmp mna mnb mni mnm mnn mnp mpa mpb mpi mpm mpn mpp n-i naa nab nai nam nan nap nba nbb nbi nbm nbn nbp nia nib nii nim nin nip nma nmb nmi nmm nmn nmp nna nnb nni nnm nnn nnp npa npb npi npm npn npp p-p paa pab pai pam pan pap pba pbb pbi pbm pbn pbp pia pib pii pim pin pip pma pmb pmi pmm pmn pmp pn- pna pnb pni pnm pnn pnp ppa ppb ppi ppm ppn ppp