set seu sh- shb shc she shh shl sho shp shr shs sht shu slb slc sle slh sll slo slp slr sls slt slu sob soc soe soh sol soo sop sor sos sot sou spb spc spe sph spl spo spp spr sps spt spu sr- srb src sre srh srl sro srp srr srs srt ss- ssb ssc sse ssh ssl sso ssp ssr sss sst ssu stb stc ste sth stl sto stp str sts stt stu sub suc sue suh sul suo sup sur sus sut suu tbb tbc tbe tbh tbl tbo tbp tbr tbs tbt tbu tcb tcc tce tch tcl tco tcp tcr tcs tct tcu te- teb tec tee teh tel teo tep ter tes tet teu th- thb thc the thh thl tho thp thr ths tht thu tlc tle tlh tll tlo tlp tlr tls tlt tlu to- tob toc toe toh tol too top tor tos tot tou tpb tpc tpe tph tpl tpo tpp tpr tps tpt tpu trb trc tre trh trl tro trp trr trs trt tru tsb tsc tse tsh tsl tso tsp tsr tss tst tsu ttb ttc tte tth ttl tto ttp ttr tts ttt ttu tub tuc tue tuh tul tuo tup tur tus tut tuu ubb ubc ube ubh ubl ubo ubp ubr ubs ubt ubu ucb ucc uce uch ucl uco ucp ucr ucs uct ucu ueb uec uee ueh uel uep uer ues uet uhb uhc uhe uhh uhl uho uhp uhr uhs uht uhu ulb ulc ule ull ulo ulp ulr uls ult ulu uob uoc uoe uol uoo uop uor uos uot up- upb upc upe uph upo upp upr ups upt upu ur- urb urc ure url uro urp urr urs urt uru usb usc use ush usl uso usp usr uss ust usu utb utc ute uth utl uto utp utr uts utt utu uuc uue uur uus uut uuu