a-a a-b a-i aaa aab aae aai aam aan aao aap ab- aba abb abe abi abm abn abo abp aea aeb aee aei aem aen aeo aep ai- aia aib aie aii aim ain aio aip ama amb ame ami amm amn amo amp an- ana anb ane ani anm ann ano anp aoa aob aoe aoi aom aon aoo aop ap- apa apb ape api apm apn apo app b-p baa bab bae bai bam ban bao bap bba bbb bbe bbi bbm bbn bbo bbp be- bea beb bee bei bem ben beo bep bi- bia bib bie bii bim bin bio bip bma bmb bme bmi bmm bmn bmo bmp bna bnb bne bni bnn bno bnp boa bob boe boi bom bon boo bop bpa bpb bpe bpi bpm bpn bpo bpp eaa eab eae eai eam ean eao eap eba ebb ebe ebi ebm ebn ebo ebp eea eeb eee eem een eeo eep eia eib eie eii eim ein eio eip em- ema emb eme emi emm emn emo emp en- ena enb ene eni enm enn eno enp eo- eoa eob eoe eoi eom eon eoo eop ep- epa epb epe epi epm epn epo epp ia- iaa iab iae iai iam ian iao iap iba ibb ibe ibi ibm ibn ibo ibp ie- iea iee iei iem ien iep iia iib iie iii iim iin iio iip im- ima imb ime imi imm imn imo imp in- ina inb ine ini inm inn ino inp io- ioa iob ioe ioi iom ion ioo iop ipa ipb ipe ipi ipm ipn ipo ipp m-o maa mab mae mai mam man mao map mba mbb mbe mbi mbm mbo mbp mea meb mee mei mem men meo mep mi- mia mib mie mii mim min mio mip mma mmb mme mmi mmm mmn mmo mmp mna mnb mne mni mnm mnn mno mnp moa mob moe moi mom mon moo mop mpa mpb mpe mpi mpm mpn mpo mpp n-i naa nab nae nai nam nan nao nap nba nbb nbe nbi nbm nbn nbo nbp ne- nea neb nee nei nem nen neo nep nia nib nie nii nim nin nio nip nma nmb nme nmi nmm nmn nmo nmp nna nnb nne nni nnm nnn nno nnp no- noa nob noe noi nom non noo nop npa npb npe npi npm npn npo npp o-i oaa oab oae oai oam oan oao oap ob- oba obb obe obi obm obn obo obp oea oeb oee oei oem oen oeo oep oia oib oie oii oim oin oio oip om- oma omb ome omi omm omn omo omp on- ona onb one oni onn ono onp oo- ooa oob ooi oom oon ooo oop op- opa opb ope opi opm opn opo opp p-p paa pab pae pai pam pan pao pap pba pbb pbe pbi pbm pbn pbo pbp pea peb pee pei pem pen peo pep pia pib pie pii pim pin pio pip pma pmb pme pmi pmm pmn pmo pmp pn- pna pnb pne pni pnm pnn pno pnp poa pob poe poi pom pon poo pop ppa ppb ppe ppi ppm ppn ppo ppp