sre srf srg sri srl srn sro srr srs srt ss- ssa ssb ssd sse ssf ssg ssi ssl ssn sso ssr sss sst sta stb std ste stf stg sti stl stn sto str sts stt taa tab tad tae taf tag tai tal tan tao tar tas tat tba tbb tbd tbe tbf tbg tbi tbl tbn tbo tbr tbs tbt tda tdb tdd tde tdf tdg tdi tdl tdn tdo tdr tds tdt te- tea teb ted tee tef teg tei tel ten teo ter tes tet tfa tfb tfd tfe tff tfg tfi tfl tfn tfo tfr tfs tft tga tgb tge tgf tgg tgi tgl tgn tgo tgr tgs tgt tia tib tid tie tif tig tii til tin tio tir tis tit tla tld tle tlf tlg tli tll tln tlo tlr tls tlt tna tnb tnd tne tnf tng tni tnl tnn tno tnr tns tnt to- toa tob tod toe tof tog toi tol ton too tor tos tot tra trb trd tre trf trg tri trl trn tro trr trs trt tsa tsb tsd tse tsf tsg tsi tsl tsn tso tsr tss tst tta ttb ttd tte ttf ttg tti ttl ttn tto ttr tts ttt