-up i-v iii iio iip iir iis iiu iix io- ioi ioo iop ior ios iou iov ipi ipo ipp ipr ips ipu ipv ipx ir- iri iro irp irr irs iru irv irx is- isi iso isp isr iss isu isv iu- iui iup iur ius ivi ivo ivp ivr ivs ivu ivv ivx ixi o-i oii oio oip oir ois oiu oiv oo- ooi ooo oop oor oos oov oox op- opi opo opp opr ops opv opx or- ori oro orp orr ors oru orv orx os- osi oso osp osr oss osu osv osx ou- oui ouo oup our ous ov- ovi ovo ovp ovs ovv ox- oxi oxo oxx p-p pii pio pip pir pis piu piv pix poi poo pop por pos pou pov pox ppi ppo ppp ppr pps ppu ppv ppx pri pro prp prr prs pru prv prx ps- psi pso psp psr pss psu psv psx pui pup pur pus puu pvi pvo pvp pvr pvs pvu pvv pxr pxs rii rio rip rir ris riv rix roi roo rop ror ros rou rov rox rpi rpo rpp rpr rps rpu rpv rpx rri rrp rrr rrs rru rsi rso rsp rsr rss rsu rsv rsx rui ruo rup rur rus ruu ruv rux rvi rvo rvp rvr rvs rvu rvv rxp rxr rxs sii sio sip sir sis siu siv six soi soo sop sor sos sou sov sox spi spo spp spr sps spu spv spx sr- sri sro srp srr srs srv srx ss- ssi sso ssp ssr sss ssu ssv ssx sui suo sup sur sus suu suv sux svi svo svp svr svs svu svv svx sxi sxs sxu uii uio uip uir uis uiu uoo uop uor uos uox up- upi upo upp upr ups upu upv upx ur- uri uro urp urr urs uru urx usi uso usp usr uss usu usv usx uur uus uuu uvo uvs uvu uvv uxo uxr uxu vi- vii vio vip vir vis viu viv vix voi voo vop vor vos vou vov vox vpi vpo vpp vpr vps vpu vpx vri vrp vrr vrs vru vsi vso vsp vsr vss vsu vsv vup vur vus vuv vvi vvo vvr vvs vvv vxr vxs vxv xii xio xis xiu xiv xix xoi xoo xop xor xos xov xox xpo xpp xps xrx xsi xsp xss xui xup xus xuv xvi xxi xxo xxp xxv xxx