-up iii iin iip iir iis iiu in- ini inn inp inr ins inu ipi ipn ipp ipr ips ipu ir- iri irn irp irr irs iru is- isi isn isp isr iss isu iu- iui iup iur ius n-i nii nin nip nir nis niu nni nnn nnp nns nnu npi npn npp npr nps npu nri nrn nrp nrr nrs nru nsi nsn nsp nsr nss nsu nui nun nup nur nus nuu p-p pii pin pip pir pis piu pn- pni pnn pnp pnr pns pnu ppi ppn ppp ppr pps ppu pri prn prp prr prs pru ps- psi psn psp psr pss psu pui pun pup pur pus puu rii rin rip rir ris rni rnn rnp rnr rns rnu rpi rpn rpp rpr rps rpu rri rrn rrp rrr rrs rru rsi rsn rsp rsr rss rsu rui run rup rur rus ruu sii sin sip sir sis siu sni snn snp snr sns snu spi spn spp spr sps spu sr- sri srn srp srr srs ss- ssi ssn ssp ssr sss ssu sui sun sup sur sus suu uii uin uip uir uis uiu un- uni unn unp unr uns unu up- upi upn upp upr ups upu ur- uri urn urp urr urs uru usi usn usp usr uss usu uun uur uus uuu