slo slr sls slt slu soa sob soe sof sok sol soo sor sos sot sou sr- sra srb sre srf srk srl sro srr srs srt ss- ssa ssb sse ssf ssk ssl sso ssr sss sst ssu sta stb ste stf stk stl sto str sts stt stu sua sub sue suf suk sul suo sur sus sut suu taa tab tae taf tak tal tao tar tas tat tau tba tbb tbe tbf tbk tbl tbo tbr tbs tbt tbu te- tea teb tee tef tek tel teo ter tes tet teu tfa tfb tfe tff tfk tfl tfo tfr tfs tft tfu tka tkb tke tkk tkl tko tkr tks tkt tla tle tlf tlk tll tlo tlr tls tlt tlu to- toa tob toe tof tok tol too tor tos tot tou tra trb tre trf trk trl tro trr trs trt tru tsa tsb tse tsf tsk tsl tso tsr tss tst tsu tta ttb tte ttf ttk ttl tto ttr tts ttt ttu tua tub tue tuf tuk tul tuo tur tus tut tuu ua- uaa uab uae uaf uak ual uao uar uas uat uau uba ubb ube ubf ubk ubl ubo ubr ubs ubt ubu uea ueb uee uef uel uer ues uet ufa ufe uff ufl ufo ufr ufs uft ufu uka ukb uke ukf ukk ukl ukr uku ula ulb ule ulf ulk ull ulo ulr uls ult ulu uoa uob uoe uok uol uoo uor uos uot ur- ura urb ure urf urk url uro urr urs urt uru usa usb use usf usk usl uso usr uss ust usu uta utb ute utf utk utl uto utr uts utt utu uua uue uur uus uut uuu