bbb bbe bbg bbk bbn bbo be- beb bee beg bek ben beo bgb bge bgg bgk bgn bgo bkb bke bkg bkk bkn bko bnb bne bng bnk bnn bno bob boe bog bok bon boo ebb ebe ebg ebk ebn ebo eeb eee eeg eek een eeo egb ege egg egn ego ekb eke ekg eko en- enb ene eng enk enn eno eo- eob eoe eog eok eon eoo gbe gbg gbk gbn gbo ge- geb gee geg gek gen geo ggb ggg ggn ggo gkb gkn gko gnb gne gnn gno gob goe gog gok gon goo kbb kbe kbk kbn kbo ke- keb kee keg kek ken keo kgb kgo kkb kke kkk kkn kn- kne kng knk knn kno kob koe kog kok kon koo nbb nbe nbg nbk nbn nbo ne- neb nee neg nek nen neo ngb nge ngg ngk ngn ngo nke nkk nkn nko nnb nne nng nnk nnn nno no- nob noe nog nok non noo ob- obb obe obg obk obn obo oeb oee oeg oen oeo oge ogg ogn ogo okb oke okg okk oko on- onb one ong onk onn ono oo- oob oog ook oon ooo