a-a a-c a-t aaa aac aaf aao aap aas aat aay ac- aca acc acf aco acp acs act acy af- afa afc aff afo afp afs aft afy aoa aoc aof aoo aop aos aot ap- apa apc apf apo app aps apt apy as- asa asc asf aso asp ass ast asy at- ata atc atf ato atp ats att ay- aya ayc ayf ayo ayp ays ayt c-- caa cac caf cao cap cas cat cay cca ccc ccf cco ccp ccs cct cfa cfc cff cfo cfp cfs cft co- coa coc cof coo cop cos cot coy cpa cpc cpf cpo cpp cps cpt csa csc csf cso csp css cst csy cta ctc ctf cto ctp cts ctt cty cya cyc cyf cyo cyp cys cyt faa fac faf fao fap fas fat fay fca fcc fcf fco fcp fcs fct fcy ffa ffc fff ffo ffp ffs fft ffy foa foc fof foo fop fos fot foy fpa fpc fpo fpp fps fpt fpy fsa fsc fsf fso fsp fss fst fta ftc ftf fto ftp fts ftt fty fy- fya fyc fyo fyp oaa oac oaf oao oap oas oat oc- oca occ ocf oco ocp ocs oct of- ofa ofc off ofo ofp ofs oft oo- ooa ooc oof ooo oop oos oot op- opa opc opf opo opp ops opt opy os- osa osc osf oso osp oss ost ot- ota otc otf oto otp ots ott oya oyo oys p-p paa pac paf pao pap pas pat pay pca pcc pcf pco pcp pcs pct pfa pfc pff pfo pfp pfs pft pfy poa poc pof poo pop pos pot poy ppa ppc ppf ppo ppp pps ppt ps- psa psc psf pso psp pss pst psy pt- pta ptc ptf pto ptp pts ptt pty py- pya pyc pyf pyo pys pyt saa sac saf sao sap sas sat say sca scc scf sco scp scs sct sfa sfc sff sfo sfp sfs sft soa soc sof soo sop sos sot soy spa spc spf spo spp sps spt spy ss- ssa ssc ssf sso ssp sss sst sta stc stf sto stp sts stt sty sy- sya syc syp sys syt taa tac taf tao tap tas tat tay tca tcc tcf tco tcp tcs tct tfa tfc tff tfo tfp tfs tft to- toa toc tof too top tos tot toy tpa tpc tpf tpo tpp tps tpt tsa tsc tsf tso tsp tss tst tsy tta ttc ttf tto ttp tts ttt tty tya tyc tyf tyo typ tys tyt yaa yac yaf yao yap yas yat yay yca ycc ycf yco ycp ycs ycy yfa yfc yff yfs yft yoc yof yoo yop yos yot yoy ypa ypf ypo yps ysa ysc yso ysp yss yst ysy yta ytc ytf yto ytp yts ytt yyc yyf yys yyt yyy