bbb bbi bbm bbr bbt bby bi- bib bii bim bir bit biy bmb bmi bmm bmr bmt brb bri brm brr brt bry btb bti btm btr btt bty by- byi bym byr byt ibb ibi ibm ibr ibt iby iib iii iim iir iit im- imb imi imm imt imy ir- irb iri irm irr irt iry itb iti itm itt ity iym iyr iyt iyy m-r mbb mbi mbm mbr mbt mi- mib mii mim mir mit miy mmb mmi mmm mmr mmt mrb mri mrm mrr mrt mry mtb mti mtm mtr mtt my- myb mym myr myt rbb rbi rbm rbr rbt rib rii rim rir rit riy rmb rmi rmm rmr rmt rrb rri rrm rrr rrt rtb rti rtm rtr rtt rty ry- rym ryr ryy tbb tbi tbm tbr tbt tib tii tim tir tit tiy tmb tmi tmm tmr tmt tmy trb tri trm trr trt try ttb tti ttm ttr ttt tty tym tyr tyt ybi ybm ybr yby yii yim yir yit ymi ymm ymt yrt ytm ytr ytt yyb yyt yyy