i-v iii iin iio iip iir iis iki ikk iko ikr iks ikv in- ini ink inn ino inp inr ins inv io- ioi ion ioo iop ior ios iov ipi ipn ipo ipp ipr ips ipv ir- iri irk irn iro irp irr irs irv is- isi isk isn iso isp isr iss isv ivi ivo ivp ivr ivs ivv kii kik kin kio kip kir kis kiv kki kkk kkn kkp kkr kks kkv kn- kni knk knn kno knp knr koi kok kon koo kop kor kos kpi kpk kpn kpo kpp kpr kps kpv kri krk krn kro krp krr krs krv ksi ksk ksn kso ksp ksr kss ksv kvi kvk kvn kvo kvp kvr kvs kvv n-i nii nik nin nio nip nir nis niv nki nkk nkn nko nkp nkr nks nni nnk nnn nno nnp nns nnv no- noi nok non noo nop nor nos nov npi npn npo npp npr nps npv nri nrk nrn nro nrp nrr nrs nrv nsi nsk nsn nso nsp nsr nss nsv nvi nvk nvn nvp nvv o-i oii oik oin oio oip oir ois oiv oki okk oko okp okr oks on- oni onk onn ono onp onr ons oo- ooi ook oon ooo oop oor oos oov op- opi opk opn opo opp opr ops opv or- ori ork orn oro orp orr ors orv os- osi osk osn oso osp osr oss osv ov- ovi ovo ovp ovs ovv p-p pii pik pin pio pip pir pis piv pki pkn pko pkp pkr pks pn- pni pnk pnn pno pnp pnr pns pnv poi pok pon poo pop por pos pov ppi ppk ppn ppo ppp ppr pps ppv pri prk prn pro prp prr prs prv ps- psi psk psn pso psp psr pss psv pvi pvk pvn pvo pvp pvr pvs pvv rii rik rin rio rip rir ris riv rkk rko rkp rks rkv rni rnn rno rnp rnr rns rnv roi rok ron roo rop ror ros rov rpi rpk rpn rpo rpp rpr rps rpv rri rrk rrn rrp rrr rrs rsi rsk rsn rso rsp rsr rss rsv rvi rvn rvo rvp rvr rvs rvv sii sik sin sio sip sir sis siv sk- ski skk sko skp skr sks sni snk snn sno snp snr sns snv soi sok son soo sop sor sos sov spi spk spn spo spp spr sps spv sr- sri srk srn sro srp srr srs srv ss- ssi ssk ssn sso ssp ssr sss ssv svi svk svn svo svp svr svs svv vi- vii vik vin vio vip vir vis viv vkp vn- vni vno vnp vnr vns vnv voi vok von voo vop vor vos vov vpi vpk vpn vpo vpp vpr vps vri vrk vrn vrp vrr vrs vsi vsk vsn vso vsp vsr vss vsv vvi vvo vvr vvs vvv