bbb bbe bbm bbn bbo bbt be- beb bee bem ben beo bet bmb bme bmm bmn bmo bmt bnb bne bnn bno bnt bob boe bom bon boo bot btb bte btm btn bto btt ebb ebe ebm ebn ebo ebt eeb eee eem een eeo eet em- emb eme emm emn emo emt en- enb ene enm enn eno ent eo- eob eoe eom eon eoo eot etb ete etm etn eto ett m-o mbb mbe mbm mbo mbt meb mee mem men meo met mmb mme mmm mmn mmo mmt mnb mne mnm mnn mno mnt mob moe mom mon moo mot mtb mte mtm mtn mto mtt nbb nbe nbm nbn nbo nbt ne- neb nee nem nen neo net nmb nme nmm nmn nmo nmt nnb nne nnm nnn nno nnt no- nob noe nom non noo not ntb nte ntm ntn nto ntt ob- obb obe obm obn obo obt oeb oee oem oen oeo oet om- omb ome omm omn omo omt on- onb one onn ono ont oo- oob oom oon ooo oot ot- otb ote otm otn oto ott tbb tbe tbm tbn tbo tbt te- teb tee tem ten teo tet tmb tme tmm tmn tmo tmt tnb tne tnm tnn tno tnt to- tob toe tom ton too tot ttb tte ttm ttn tto ttt