sin sio sir sis sit six sna snb snc sne sni snn sno snr sns snt soa sob soc soe soi son soo sor sos sot sox sr- sra srb src sre sri srn sro srr srs srt srx ss- ssa ssb ssc sse ssi ssn sso ssr sss sst ssx sta stb stc ste sti stn sto str sts stt stx sxc sxi sxn sxs sxt t-x taa tab tac tae tai tan tao tar tas tat tax tba tbb tbc tbe tbi tbn tbo tbr tbs tbt tca tcb tcc tce tci tcn tco tcr tcs tct tcx te- tea teb tec tee tei ten teo ter tes tet tex tia tib tic tie tii tin tio tir tis tit tix tna tnb tnc tne tni tnn tno tnr tns tnt tnx to- toa tob toc toe toi ton too tor tos tot tox tra trb trc tre tri trn tro trr trs trt trx tsa tsb tsc tse tsi tsn tso tsr tss tst tsx tta ttb ttc tte tti ttn tto ttr tts ttt ttx txe txi txn txs txt xaa xac xan xar xas xat xbc xbe xbr xbx xcb xci xcr xcx xee xen xer xes xet xex xia xic xie xii xin xio xis xit xix xna xnc xno xns xoa xoc xoi xon xoo xor xos xot xox xrc xrt xrx xsa xsb xsc xsi xss xst xtc xti xtr xts xtx xxi xxo xxx