-up iii iip iis iit iiu iix ipi ipp ips ipt ipu ipx is- isi isp iss ist isu iti itp its itt itu itx iu- iui iup ius iut ixi p-p pii pip pis pit piu pix ppi ppp pps ppt ppu ppx ps- psi psp pss pst psu psx pt- pti ptp pts ptt ptu ptx pui pup pus put puu pxs pxt sii sip sis sit siu six spi spp sps spt spu spx ss- ssi ssp sss sst ssu ssx sti stp sts stt stu stx sui sup sus sut suu sux sxi sxs sxt sxu t-x tii tip tis tit tiu tix tpi tpp tps tpt tpu tpx tsi tsp tss tst tsu tsx tti ttp tts ttt ttu ttx tui tup tus tut tuu tux txi txs txt txu uii uip uis uit uiu up- upi upp ups upt upu upx usi usp uss ust usu usx uti utp uts utt utu utx uus uut uuu uxt uxu xii xis xit xiu xix xpp xps xpt xsi xsp xss xst xti xtp xts xtx xui xup xus xxi xxp xxx