i-v iii iin iip iir iis in- ini inn inp inr ins inv ipi ipn ipp ipr ips ipv ir- iri irn irp irr irs irv is- isi isn isp isr iss isv ivi ivp ivr ivs ivv n-i nii nin nip nir nis niv nni nnn nnp nns nnv npi npn npp npr nps npv nri nrn nrp nrr nrs nrv nsi nsn nsp nsr nss nsv nvi nvn nvp nvv p-p pii pin pip pir pis piv pn- pni pnn pnp pnr pns pnv ppi ppn ppp ppr pps ppv pri prn prp prr prs prv ps- psi psn psp psr pss psv pvi pvn pvp pvr pvs pvv rii rin rip rir ris riv rni rnn rnp rnr rns rnv rpi rpn rpp rpr rps rpv rri rrn rrp rrr rrs rsi rsn rsp rsr rss rsv rvi rvn rvp rvr rvs rvv sii sin sip sir sis siv sni snn snp snr sns snv spi spn spp spr sps spv sr- sri srn srp srr srs srv ss- ssi ssn ssp ssr sss ssv svi svn svp svr svs svv vi- vii vin vip vir vis viv vn- vni vnp vnr vns vnv vpi vpn vpp vpr vps vri vrn vrp vrr vrs vsi vsn vsp vsr vss vsv vvi vvr vvs vvv