-ol lll llm llo lls llt lml lmm lmo lms lmt lol lom loo los lot lsl lsm lso lss lst ltl ltm lto lts ltt m-o mll mlm mlo mls mlt mml mmm mmo mms mmt mol mom moo mos mot msl msm mso mss mst mtl mtm mto mts mtt oll olm olo ols olt om- oml omm omo oms omt oo- ool oom ooo oos oot os- osl osm oso oss ost ot- otl otm oto ots ott sll slm slo sls slt sml smm smo sms smt sol som soo sos sot ss- ssl ssm sso sss sst stl stm sto sts stt tll tlm tlo tls tlt tml tmm tmo tms tmt to- tol tom too tos tot tsl tsm tso tss tst ttl ttm tto tts ttt