-up iii iio iip iis iit iiu io- ioi ioo iop ios iot iou ipi ipo ipp ips ipt ipu is- isi iso isp iss ist isu iti ito itp its itt itu iu- iui iup ius iut o-i oii oio oip ois oit oiu oo- ooi ooo oop oos oot op- opi opo opp ops opt os- osi oso osp oss ost osu ot- oti oto otp ots ott otu ou- oui ouo oup ous out p-p pii pio pip pis pit piu poi poo pop pos pot pou ppi ppo ppp pps ppt ppu ps- psi pso psp pss pst psu pt- pti pto ptp pts ptt ptu pui pup pus put puu sii sio sip sis sit siu soi soo sop sos sot sou spi spo spp sps spt spu ss- ssi sso ssp sss sst ssu sti sto stp sts stt stu sui suo sup sus sut suu tii tio tip tis tit tiu to- toi too top tos tot tou tpi tpo tpp tps tpt tpu tsi tso tsp tss tst tsu tti tto ttp tts ttt ttu tui tuo tup tus tut tuu uii uio uip uis uit uiu uoo uop uos uot up- upi upo upp ups upt upu usi uso usp uss ust usu uti uto utp uts utt utu uus uut uuu