a-a a-c a-t aaa aac aao aap aas aat aay ac- aca acc aco acp acs act acy aoa aoc aoo aop aos aot ap- apa apc apo app aps apt apy as- asa asc aso asp ass ast asy at- ata atc ato atp ats att ay- aya ayc ayo ayp ays ayt c-- caa cac cao cap cas cat cay cca ccc cco ccp ccs cct co- coa coc coo cop cos cot coy cpa cpc cpo cpp cps cpt csa csc cso csp css cst csy cta ctc cto ctp cts ctt cty cya cyc cyo cyp cys cyt oaa oac oao oap oas oat oc- oca occ oco ocp ocs oct oo- ooa ooc ooo oop oos oot op- opa opc opo opp ops opt opy os- osa osc oso osp oss ost ot- ota otc oto otp ots ott oya oyo oys p-p paa pac pao pap pas pat pay pca pcc pco pcp pcs pct poa poc poo pop pos pot poy ppa ppc ppo ppp pps ppt ps- psa psc pso psp pss pst psy pt- pta ptc pto ptp pts ptt pty py- pya pyc pyo pys pyt saa sac sao sap sas sat say sca scc sco scp scs sct soa soc soo sop sos sot soy spa spc spo spp sps spt spy ss- ssa ssc sso ssp sss sst sta stc sto stp sts stt sty sy- sya syc syp sys syt taa tac tao tap tas tat tay tca tcc tco tcp tcs tct to- toa toc too top tos tot toy tpa tpc tpo tpp tps tpt tsa tsc tso tsp tss tst tsy tta ttc tto ttp tts ttt tty tya tyc tyo typ tys tyt yaa yac yao yap yas yat yay yca ycc yco ycp ycs ycy yoc yoo yop yos yot yoy ypa ypo yps ysa ysc yso ysp yss yst ysy yta ytc yto ytp yts ytt yyc yys yyt yyy