-ol bbb bbc bbe bbg bbk bbl bbo bcb bcc bce bcg bck bcl bco bcz be- beb bec bee beg bek bel beo bez bgb bgc bge bgg bgk bgl bgo bgz bkb bkc bke bkg bkk bkl bko blb blc ble blg blk bll blo blz bob boc boe bog bok bol boo boz bze bzo bzz c-- cbb cbc cbe cbg cbk cbl cbo cbz ccb ccc cce ccg cck ccl cco ccz ce- ceb cec cee ceg cek cel ceo cez cgb cgc cge cgg cgl cgo ckb ckc cko cl- clb clc cle clg clk cll clo clz co- cob coc coe cog cok col coo coz cz- czc cze czk czo ebb ebc ebe ebg ebk ebl ebo ec- ecb ecc ece ecg eck ecl eco eeb eec eee eeg eek eel eeo egb egc ege egg egl ego ekb ekc eke ekg ekl eko elb elc ele elg elk ell elo elz eo- eob eoc eoe eog eok eol eoo eze ezo ezz gbc gbe gbg gbk gbl gbo gbz gcb gcc gce gcg gck gcl gco ge- geb gec gee geg gek gel geo gez ggb ggc ggg ggo ggz gkb gko glb glc gle glg glk gll glo glz gob goc goe gog gok gol goo goz gzo k-z kbb kbc kbe kbk kbl kbo kbz kcb kcc kce kcg kck kcl ke- keb kec kee keg kek kel keo kez kgb kgc kgl kgo kkb kkc kke kkk kkl kl- klb klc klg klo klz kob koc koe kog kok kol koo koz kzo lbb lbc lbe lbg lbk lbl lbo lcb lcc lce lcg lck lcl lco leb lec lee leg lek lel leo lez lgb lgc lge lgg lgk lgl lgo lkb lkg lkl llb llc lle llg llk lll llo llz lob loc loe log lok lol loo loz lzo ob- obb obc obe obg obk obl obo oc- ocb occ ocg ock ocl oco ocz oeb oec oee oeg oel oeo ogc oge ogg ogl ogo okb okc oke okg okk okl oko olb olc ole olg olk oll olo oo- oob ooc oog ook ool ooo oze ozo ozz z-g zbb zbc zbl zce zcl zco zeb zec zee zek zel zeo zez zgb zgg zo- zob zoc zoe zog zok zol zoo zzz