sod sof sog soh soi soo sop sor sos sot sou spd spf spg sph spi spo spp spr sps spt spu sr- srd srf srg srh sri sro srp srr srs srt ss- ssd ssf ssg ssh ssi sso ssp ssr sss sst ssu std stf stg sth sti sto stp str sts stt stu sud suf sug suh sui suo sup sur sus sut suu tdd tdf tdg tdh tdi tdo tdp tdr tds tdt tdu tfd tff tfg tfh tfi tfo tfp tfr tfs tft tfu tgf tgg tgh tgi tgo tgp tgr tgs tgt tgu th- thd thf thg thh thi tho thp thr ths tht thu tid tif tig tih tii tio tip tir tis tit tiu to- tod tof tog toh toi too top tor tos tot tou tpd tpf tpg tph tpi tpo tpp tpr tps tpt tpu trd trf trg trh tri tro trp trr trs trt tru tsd tsf tsg tsh tsi tso tsp tsr tss tst tsu ttd ttf ttg tth tti tto ttp ttr tts ttt ttu tud tuf tug tuh tui tuo tup tur tus tut tuu udd udf udg udi udo udp udr uds udt udu ufd uff ufg ufh ufi ufo ufp ufr ufs uft ufu ugf ugg ugh ugi ugo ugp ugr ugs ugt ugu uhd uhf uhh uhi uho uhp uhr uhs uht uhu uid uif uig uii uio uip uir uis uit uiu uod uog uoo uop uor uos uot up- upd upf upg uph upi upo upp upr ups upt upu ur- urd urf urg uri uro urp urr urs urt uru usd usf usg ush usi uso usp usr uss ust usu utd utf uth uti uto utp utr uts utt utu uug uur uus uut uuu