bbb bbm bbo bbr bbt bby bmb bmm bmo bmr bmt bob bom boo bor bot boy brb brm bro brr brt bry btb btm bto btr btt bty by- bym byo byr byt m-o m-r mbb mbm mbo mbr mbt mmb mmm mmo mmr mmt mob mom moo mor mot moy mrb mrm mro mrr mrt mry mtb mtm mto mtr mtt my- myb mym myo myr myt ob- obb obm obo obr obt oby om- omb omm omo omr omt omy oo- oob oom ooo oor oot or- orb orm oro orr ort ory ot- otb otm oto otr ott oyo rbb rbm rbo rbr rbt rmb rmm rmo rmr rmt rob rom roo ror rot roy rrb rrm rrr rrt rtb rtm rto rtr rtt rty ry- rym ryo ryr ryy tbb tbm tbo tbr tbt tmb tmm tmo tmr tmt tmy to- tob tom too tor tot toy trb trm tro trr trt try ttb ttm tto ttr ttt tty tym tyo tyr tyt ybm ybr yby ymm ymo ymt yob yom yoo yor yot yoy yro yrt ytm yto ytr ytt yyb yyt yyy