spo spp spr sps spt sr- sra src sre srf srh sri srl srn sro srp srr srs srt ss- ssa ssc sse ssf ssh ssi ssl ssn sso ssp ssr sss sst sta stc ste stf sth sti stl stn sto stp str sts stt taa tac tae taf tah tai tal tan tao tap tar tas tat tca tcc tce tcf tch tci tcl tcn tco tcp tcr tcs tct te- tea tec tee tef teh tei tel ten teo tep ter tes tet tfa tfc tfe tff tfh tfi tfl tfn tfo tfp tfr tfs tft th- tha thc the thf thh thi thl thn tho thp thr ths tht tia tic tie tif tih tii til tin tio tip tir tis tit tla tlc tle tlf tlh tli tll tln tlo tlp tlr tls tlt tna tnc tne tnf tnh tni tnl tnn tno tnp tnr tns tnt to- toa toc toe tof toh toi tol ton too top tor tos tot tpa tpc tpe tpf tph tpi tpl tpn tpo tpp tpr tps tpt tra trc tre trf trh tri trl trn tro trp trr trs trt tsa tsc tse tsf tsh tsi tsl tsn tso tsp tsr tss tst tta ttc tte ttf tth tti ttl ttn tto ttp ttr tts ttt