sey sna snb snc sne snn sno snp snr sns snt sny soa sob soc soe son soo sop sor sos sot soy spa spb spc spe spn spo spp spr sps spt spy sr- sra srb src sre srn sro srp srr srs srt sry ss- ssa ssb ssc sse ssn sso ssp ssr sss sst sta stb stc ste stn sto stp str sts stt sty sy- sya syb syc sye syn syp syr sys syt taa tab tac tae tan tao tap tar tas tat tay tba tbb tbc tbe tbn tbo tbp tbr tbs tbt tca tcb tcc tce tcn tco tcp tcr tcs tct te- tea teb tec tee ten teo tep ter tes tet tey tna tnb tnc tne tnn tno tnp tnr tns tnt to- toa tob toc toe ton too top tor tos tot toy tpa tpb tpc tpe tpn tpo tpp tpr tps tpt tra trb trc tre trn tro trp trr trs trt try tsa tsb tsc tse tsn tso tsp tsr tss tst tsy tta ttb ttc tte ttn tto ttp ttr tts ttt tty tya tyc tye tyn tyo typ tyr tys tyt yaa yab yac yae yan yao yap yar yas yat yay ybc ybe ybp ybr ybs yby yca ycc yce yco ycp ycs ycy yea yeb yec yee yen yeo yep yer yes yet yey yna yne ynn ynp yns yny yob yoc yoe yon yoo yop yor yos yot yoy ypa ypo yps yra yrc yre yrn yro yrp yrs yrt ysa ysb ysc yse yso ysp ysr yss yst ysy yta ytc yte ytn yto ytp ytr yts ytt yyb yyc yye yys yyt yyy