a-a a-b a-i aaa aab aae aai aam aan aao ab- aba abb abe abi abm abn abo aea aeb aee aei aem aen aeo ai- aia aib aie aii aim ain aio ama amb ame ami amm amn amo an- ana anb ane ani anm ann ano aoa aob aoe aoi aom aon aoo baa bab bae bai bam ban bao bba bbb bbe bbi bbm bbn bbo be- bea beb bee bei bem ben beo bi- bia bib bie bii bim bin bio bma bmb bme bmi bmm bmn bmo bna bnb bne bni bnn bno boa bob boe boi bom bon boo eaa eab eae eai eam ean eao eba ebb ebe ebi ebm ebn ebo eea eeb eee eem een eeo eia eib eie eii eim ein eio em- ema emb eme emi emm emn emo en- ena enb ene eni enm enn eno eo- eoa eob eoe eoi eom eon eoo ia- iaa iab iae iai iam ian iao iba ibb ibe ibi ibm ibn ibo ie- iea iee iei iem ien iia iib iie iii iim iin iio im- ima imb ime imi imm imn imo in- ina inb ine ini inm inn ino io- ioa iob ioe ioi iom ion ioo m-o maa mab mae mai mam man mao mba mbb mbe mbi mbm mbo mea meb mee mei mem men meo mi- mia mib mie mii mim min mio mma mmb mme mmi mmm mmn mmo mna mnb mne mni mnm mnn mno moa mob moe moi mom mon moo n-i naa nab nae nai nam nan nao nba nbb nbe nbi nbm nbn nbo ne- nea neb nee nei nem nen neo nia nib nie nii nim nin nio nma nmb nme nmi nmm nmn nmo nna nnb nne nni nnm nnn nno no- noa nob noe noi nom non noo o-i oaa oab oae oai oam oan oao ob- oba obb obe obi obm obn obo oea oeb oee oei oem oen oeo oia oib oie oii oim oin oio om- oma omb ome omi omm omn omo on- ona onb one oni onn ono oo- ooa oob ooi oom oon ooo