-up iii iio iip iis iiu io- ioi ioo iop ios iou ipi ipo ipp ips ipu is- isi iso isp iss isu iu- iui iup ius o-i oii oio oip ois oiu oo- ooi ooo oop oos op- opi opo opp ops os- osi oso osp oss osu ou- oui ouo oup ous p-p pii pio pip pis piu poi poo pop pos pou ppi ppo ppp pps ppu ps- psi pso psp pss psu pui pup pus puu sii sio sip sis siu soi soo sop sos sou spi spo spp sps spu ss- ssi sso ssp sss ssu sui suo sup sus suu uii uio uip uis uiu uoo uop uos up- upi upo upp ups upu usi uso usp uss usu uus uuu