-up iii iin iip iis iiu in- ini inn inp ins inu ipi ipn ipp ips ipu is- isi isn isp iss isu iu- iui iup ius n-i nii nin nip nis niu nni nnn nnp nns nnu npi npn npp nps npu nsi nsn nsp nss nsu nui nun nup nus nuu p-p pii pin pip pis piu pn- pni pnn pnp pns pnu ppi ppn ppp pps ppu ps- psi psn psp pss psu pui pun pup pus puu sii sin sip sis siu sni snn snp sns snu spi spn spp sps spu ss- ssi ssn ssp sss ssu sui sun sup sus suu uii uin uip uis uiu un- uni unn unp uns unu up- upi upn upp ups upu usi usn usp uss usu uun uus uuu