c-- ccc ccm cco ccp ccs cmc cmm cmo cmp cms cmy co- coc com coo cop cos coy cpc cpm cpo cpp cps csc csm cso csp css csy cyc cym cyo cyp cys m-o mc- mcc mcm mco mcp mcs mmc mmm mmo mmp mms moc mom moo mop mos moy mpc mpm mpo mpp mps msc msm mso msp mss msy my- myc mym myo mys oc- occ ocm oco ocp ocs om- omc omm omo omp oms omy oo- ooc oom ooo oop oos op- opc opm opo opp ops opy os- osc osm oso osp oss oyo oys p-p pcc pcm pco pcp pcs pmc pmm pmo pmp pms poc pom poo pop pos poy ppc ppm ppo ppp pps ps- psc psm pso psp pss psy py- pyc pym pyo pys scc scm sco scp scs smc smm smo smp sms smy soc som soo sop sos soy spc spm spo spp sps spy ss- ssc ssm sso ssp sss sy- syc sym syp sys ycc yco ycp ycs ycy ymc ymm ymo yms yoc yom yoo yop yos yoy ypo yps ysc ysm yso ysp yss ysy yyc yys yyy