-ol bbb bbe bbl bbm bbo bbt be- beb bee bel bem beo bet blb ble bll blm blo blt bmb bme bml bmm bmo bmt bob boe bol bom boo bot btb bte btl btm bto btt ebb ebe ebl ebm ebo ebt eeb eee eel eem eeo eet elb ele ell elm elo elt em- emb eme eml emm emo emt eo- eob eoe eol eom eoo eot etb ete etl etm eto ett lbb lbe lbl lbm lbo lbt leb lee lel lem leo let llb lle lll llm llo llt lmb lme lml lmm lmo lmt lob loe lol lom loo lot ltb lte ltl ltm lto ltt m-o mbb mbe mbl mbm mbo mbt meb mee mel mem meo met mlb mle mll mlm mlo mlt mmb mme mml mmm mmo mmt mob moe mol mom moo mot mtb mte mtl mtm mto mtt ob- obb obe obl obm obo obt oeb oee oel oem oeo oet olb ole oll olm olo olt om- omb ome oml omm omo omt oo- oob ool oom ooo oot ot- otb ote otl otm oto ott tbb tbe tbl tbm tbo tbt te- teb tee tel tem teo tet tle tll tlm tlo tlt tmb tme tml tmm tmo tmt to- tob toe tol tom too tot ttb tte ttl ttm tto ttt