sr- sra srb src sre srf srg srh srk srm srn sro srp srr srs srt ss- ssa ssb ssc sse ssf ssg ssh ssk ssm ssn sso ssp ssr sss sst sta stb stc ste stf stg sth stk stm stn sto stp str sts stt taa tab tac tae taf tag tah tak tam tan tao tap tar tas tat tba tbb tbc tbe tbf tbg tbh tbk tbm tbn tbo tbp tbr tbs tbt tca tcb tcc tce tcf tcg tch tck tcm tcn tco tcp tcr tcs tct te- tea teb tec tee tef teg teh tek tem ten teo tep ter tes tet tfa tfb tfc tfe tff tfg tfh tfk tfm tfn tfo tfp tfr tfs tft tga tgb tgc tge tgf tgg tgh tgk tgm tgn tgo tgp tgr tgs tgt th- tha thb thc the thf thg thh thk thm thn tho thp thr ths tht tka tkb tkc tke tkg tkk tkm tko tkp tkr tks tkt tma tmb tmc tme tmf tmg tmh tmk tmm tmn tmo tmp tmr tms tmt tna tnb tnc tne tnf tng tnh tnk tnm tnn tno tnp tnr tns tnt to- toa tob toc toe tof tog toh tok tom ton too top tor tos tot tpa tpb tpc tpe tpf tpg tph tpk tpm tpn tpo tpp tpr tps tpt tra trb trc tre trf trg trh trk trm trn tro trp trr trs trt tsa tsb tsc tse tsf tsg tsh tsk tsm tsn tso tsp tsr tss tst tta ttb ttc tte ttf ttg tth ttk ttm ttn tto ttp ttr tts ttt