a-a a-b aaa aab aae aag aam aan aao ab- aba abb abe abg abm abn abo aea aeb aee aeg aem aen aeo ag- aga agb age agg agm agn ago ama amb ame amg amm amn amo an- ana anb ane ang anm ann ano aoa aob aoe aog aom aon aoo baa bab bae bag bam ban bao bba bbb bbe bbg bbm bbn bbo be- bea beb bee beg bem ben beo bga bgb bge bgg bgm bgn bgo bma bmb bme bmg bmm bmn bmo bna bnb bne bng bnn bno boa bob boe bog bom bon boo eaa eab eae eag eam ean eao eba ebb ebe ebg ebm ebn ebo eea eeb eee eeg eem een eeo ega egb ege egg egm egn ego em- ema emb eme emg emm emn emo en- ena enb ene eng enm enn eno eo- eoa eob eoe eog eom eon eoo gaa gab gae gag gam gan gao gba gbe gbg gbm gbn gbo ge- gea geb gee geg gem gen geo gga ggb ggg ggm ggn ggo gma gmb gme gmg gmm gmn gmo gna gnb gne gnm gnn gno goa gob goe gog gom gon goo m-o maa mab mae mag mam man mao mba mbb mbe mbg mbm mbo mea meb mee meg mem men meo mga mgb mge mgm mgn mgo mma mmb mme mmg mmm mmn mmo mna mnb mne mng mnm mnn mno moa mob moe mog mom mon moo naa nab nae nag nam nan nao nba nbb nbe nbg nbm nbn nbo ne- nea neb nee neg nem nen neo nga ngb nge ngg ngm ngn ngo nma nmb nme nmg nmm nmn nmo nna nnb nne nng nnm nnn nno no- noa nob noe nog nom non noo oaa oab oae oag oam oan oao ob- oba obb obe obg obm obn obo oea oeb oee oeg oem oen oeo oga oge ogg ogn ogo om- oma omb ome omg omm omn omo on- ona onb one ong onn ono oo- ooa oob oog oom oon ooo