spo spp spr sps spt spz sr- sra src sre sri srn sro srp srr srs srt ss- ssa ssc sse ssi ssn sso ssp ssr sss sst ssz sta stc ste sti stn sto stp str sts stt stz sza sze szi szp szr taa tac tae tai tan tao tap tar tas tat taz tca tcc tce tci tcn tco tcp tcr tcs tct te- tea tec tee tei ten teo tep ter tes tet tez tia tic tie tii tin tio tip tir tis tit tiz tna tnc tne tni tnn tno tnp tnr tns tnt tnz to- toa toc toe toi ton too top tor tos tot toz tpa tpc tpe tpi tpn tpo tpp tpr tps tpt tpz tra trc tre tri trn tro trp trr trs trt trz tsa tsc tse tsi tsn tso tsp tsr tss tst tta ttc tte tti ttn tto ttp ttr tts ttt tza tze tzs zaa zac zai zan zao zap zar zas zat zaz zce zco zcs zea zec zee zen zeo zep zer zes zet zez zia zie zin zio zip zir zis zit ziz znc zne znn zno znp zns zo- zoa zoc zoe zoi zon zoo zor zos zot zpc zpe zpi zpo zpp zpr zpt zro zrp zrs zsa zse zsi zst zsz zta zte ztr zzr zzs zzt zzz