spo spp spr sps spt sr- sra srb src srd sre srh srl srn sro srp srr srs srt ss- ssa ssb ssc ssd sse ssh ssl ssn sso ssp ssr sss sst sta stb stc std ste sth stl stn sto stp str sts stt taa tab tac tad tae tah tal tan tao tap tar tas tat tba tbb tbc tbd tbe tbh tbl tbn tbo tbp tbr tbs tbt tca tcb tcc tcd tce tch tcl tcn tco tcp tcr tcs tct tda tdb tdc tdd tde tdh tdl tdn tdo tdp tdr tds tdt te- tea teb tec ted tee teh tel ten teo tep ter tes tet th- tha thb thc thd the thh thl thn tho thp thr ths tht tla tlc tld tle tlh tll tln tlo tlp tlr tls tlt tna tnb tnc tnd tne tnh tnl tnn tno tnp tnr tns tnt to- toa tob toc tod toe toh tol ton too top tor tos tot tpa tpb tpc tpd tpe tph tpl tpn tpo tpp tpr tps tpt tra trb trc trd tre trh trl trn tro trp trr trs trt tsa tsb tsc tsd tse tsh tsl tsn tso tsp tsr tss tst tta ttb ttc ttd tte tth ttl ttn tto ttp ttr tts ttt