m-o m-r mmm mmo mmp mmr mms mom moo mop mor mos moy mpm mpo mpp mpr mps mrm mro mrp mrr mrs mry msm mso msp msr mss msy my- mym myo myr mys om- omm omo omp omr oms omy oo- oom ooo oop oor oos op- opm opo opp opr ops opy or- orm oro orp orr ors ory os- osm oso osp osr oss oyo oys p-p pmm pmo pmp pmr pms pom poo pop por pos poy ppm ppo ppp ppr pps prm pro prp prr prs pry ps- psm pso psp psr pss psy py- pym pyo pyr pys rmm rmo rmp rmr rms rom roo rop ror ros roy rpm rpo rpp rpr rps rrm rrp rrr rrs rsm rso rsp rsr rss ry- rym ryo ryr rys ryy smm smo smp smr sms smy som soo sop sor sos soy spm spo spp spr sps spy sr- srm sro srp srr srs sry ss- ssm sso ssp ssr sss sy- sym syp syr sys ymm ymo yms yom yoo yop yor yos yoy ypo yps yro yrp yrs ysm yso ysp ysr yss ysy yys yyy