sar sas sat sau sba sbb sbc sbe sbi sbo sbp sbr sbs sbt sbu sca scb scc sce sci sco scp scr scs sct scu se- sea seb sec see sei seo sep ser ses set seu sia sib sic sie sii sio sip sir sis sit siu soa sob soc soe soi soo sop sor sos sot sou spa spb spc spe spi spo spp spr sps spt spu sr- sra srb src sre sri sro srp srr srs srt ss- ssa ssb ssc sse ssi sso ssp ssr sss sst ssu sta stb stc ste sti sto stp str sts stt stu sua sub suc sue sui suo sup sur sus sut suu taa tab tac tae tai tao tap tar tas tat tau tba tbb tbc tbe tbi tbo tbp tbr tbs tbt tbu tca tcb tcc tce tci tco tcp tcr tcs tct tcu te- tea teb tec tee tei teo tep ter tes tet teu tia tib tic tie tii tio tip tir tis tit tiu to- toa tob toc toe toi too top tor tos tot tou tpa tpb tpc tpe tpi tpo tpp tpr tps tpt tpu tra trb trc tre tri tro trp trr trs trt tru tsa tsb tsc tse tsi tso tsp tsr tss tst tsu tta ttb ttc tte tti tto ttp ttr tts ttt ttu tua tub tuc tue tui tuo tup tur tus tut tuu ua- uaa uab uac uae uai uao uap uar uas uat uau uba ubb ubc ube ubi ubo ubp ubr ubs ubt ubu uca ucb ucc uce uci uco ucp ucr ucs uct ucu uea ueb uec uee uei uep uer ues uet uia uib uic uie uii uio uip uir uis uit uiu uoa uob uoc uoe uoo uop uor uos uot up- upa upb upc upe upi upo upp upr ups upt upu ur- ura urb urc ure uri uro urp urr urs urt uru usa usb usc use usi uso usp usr uss ust usu uta utb utc ute uti uto utp utr uts utt utu uua uuc uue uur uus uut uuu