a-a a-c aaa aac aak aao aap aas aay ac- aca acc ack aco acp acs acy aka akc akk ako akp aks aoa aoc aok aoo aop aos ap- apa apc apk apo app aps apy as- asa asc ask aso asp ass asy ay- aya ayc ayk ayo ayp ays c-- caa cac cak cao cap cas cay cca ccc cck cco ccp ccs cka ckc cko cks cky co- coa coc cok coo cop cos coy cpa cpc cpk cpo cpp cps csa csc csk cso csp css csy cya cyc cyk cyo cyp cys ka- kaa kac kak kao kap kas kay kca kcc kck kcp kcs kkc kkk kkp kks kky koa koc kok koo kop kos koy kpa kpc kpk kpo kpp kps ksa ksc ksk kso ksp kss kya kyc kyo kyp kys oaa oac oak oao oap oas oc- oca occ ock oco ocp ocs oka okc okk oko okp oks oo- ooa ooc ook ooo oop oos op- opa opc opk opo opp ops opy os- osa osc osk oso osp oss oya oyo oys p-p paa pac pak pao pap pas pay pca pcc pck pco pcp pcs pka pkc pko pkp pks pky poa poc pok poo pop pos poy ppa ppc ppk ppo ppp pps ps- psa psc psk pso psp pss psy py- pya pyc pyk pyo pys saa sac sak sao sap sas say sca scc sck sco scp scs sk- ska skc skk sko skp sks sky soa soc sok soo sop sos soy spa spc spk spo spp sps spy ss- ssa ssc ssk sso ssp sss sy- sya syc syk syp sys yaa yac yak yao yap yas yay yca ycc yco ycp ycs ycy yka ykk yoc yok yoo yop yos yoy ypa ypo yps ysa ysc ysk yso ysp yss ysy yyc yys yyy