k-t kkk kkm kkr kkt kmk kmm kmo kmt kok kom koo kor kot krk kro krr krt ktk ktm kto ktr ktt m-o m-r mkk mkm mko mkr mkt mmk mmm mmo mmr mmt mok mom moo mor mot mrk mrm mro mrr mrt mtk mtm mto mtr mtt okk oko okr om- omm omo omr omt oo- ook oom ooo oor oot or- ork orm oro orr ort ot- otk otm oto otr ott rkk rkm rko rkt rmm rmo rmr rmt rok rom roo ror rot rrk rrm rrr rrt rtk rtm rto rtr rtt tkk tkm tko tkr tkt tmk tmm tmo tmr tmt to- tok tom too tor tot trk trm tro trr trt ttk ttm tto ttr ttt