sit siu sne snf sng sni snn sno snp snr sns snt snu soe sof sog soi son soo sop sor sos sot sou spe spf spg spi spn spo spp spr sps spt spu sr- sre srf srg sri srn sro srp srr srs srt ss- sse ssf ssg ssi ssn sso ssp ssr sss sst ssu ste stf stg sti stn sto stp str sts stt stu sue suf sug sui sun suo sup sur sus sut suu te- tee tef teg tei ten teo tep ter tes tet teu tfe tff tfg tfi tfn tfo tfp tfr tfs tft tfu tge tgf tgg tgi tgn tgo tgp tgr tgs tgt tgu tie tif tig tii tin tio tip tir tis tit tiu tne tnf tng tni tnn tno tnp tnr tns tnt to- toe tof tog toi ton too top tor tos tot tou tpe tpf tpg tpi tpn tpo tpp tpr tps tpt tpu tre trf trg tri trn tro trp trr trs trt tru tse tsf tsg tsi tsn tso tsp tsr tss tst tsu tte ttf ttg tti ttn tto ttp ttr tts ttt ttu tue tuf tug tui tun tuo tup tur tus tut tuu uee uef ueg uei uen uep uer ues uet ufe uff ufg ufi ufn ufo ufp ufr ufs uft ufu uge ugf ugg ugi ugn ugo ugp ugr ugs ugt ugu uie uif uig uii uin uio uip uir uis uit uiu un- une unf ung uni unn uno unp unr uns unt unu uoe uog uon uoo uop uor uos uot up- upe upf upg upi upn upo upp upr ups upt upu ur- ure urf urg uri urn uro urp urr urs urt uru use usf usg usi usn uso usp usr uss ust usu ute utf uti utn uto utp utr uts utt utu uue uug uun uur uus uut uuu