ook ool oon ooo oos oot os- osc osd osg osh osi osk osl osn oso oss ost ot- otc otd otg oth oti otk otl otn oto ots ott scc scd scg sch sci sck scl scn sco scs sct sdc sdd sdg sdh sdi sdk sdl sdn sdo sds sdt sgc sgd sgg sgh sgi sgk sgl sgn sgo sgs sgt sh- shc shd shg shh shi shk shl shn sho shs sht sic sid sig sih sii sik sil sin sio sis sit sk- skc skd skg skh ski skk skl sko sks skt slc sld slg slh sli slk sll sln slo sls slt snc snd sng sni snk snl snn sno sns snt soc sod sog soh soi sok sol son soo sos sot ss- ssc ssd ssg ssh ssi ssk ssl ssn sso sss sst stc std stg sth sti stk stl stn sto sts stt tcc tcd tcg tch tci tck tcl tcn tco tcs tct tdc tdd tdg tdh tdi tdk tdl tdn tdo tds tdt tgc tgg tgh tgi tgk tgl tgn tgo tgs tgt th- thc thd thg thh thi thk thl thn tho ths tht tic tid tig tih tii tik til tin tio tis tit tkc tkg tkk tkl tko tks tkt tlc tld tlg tlh tli tlk tll tln tlo tls tlt tnc tnd tng tnh tni tnk tnl tnn tno tns tnt to- toc tod tog toh toi tok tol ton too tos tot tsc tsd tsg tsh tsi tsk tsl tsn tso tss tst ttc ttd ttg tth tti ttk ttl ttn tto tts ttt