bbb bbm bbo bbt bby bmb bmm bmo bmt bob bom boo bot boy btb btm bto btt bty by- bym byo byt m-o mbb mbm mbo mbt mmb mmm mmo mmt mob mom moo mot moy mtb mtm mto mtt my- myb mym myo myt ob- obb obm obo obt oby om- omb omm omo omt omy oo- oob oom ooo oot ot- otb otm oto ott oyo tbb tbm tbo tbt tmb tmm tmo tmt tmy to- tob tom too tot toy ttb ttm tto ttt tty tym tyo tyt ybm yby ymm ymo ymt yob yom yoo yot yoy ytm yto ytt yyb yyt yyy