iii iin iip iis in- ini inn inp ins iny ipi ipn ipp ips ipy is- isi isn isp iss isy iys iyy n-i nii nin nip nis nni nnn nnp nns npi npn npp nps nsi nsn nsp nss nsy nyn nyp nys nyy p-p pii pin pip pis pn- pni pnn pnp pns pny ppi ppn ppp pps ps- psi psn psp pss psy py- pyn pys sii sin sip sis sni snn snp sns sny spi spn spp sps spy ss- ssi ssn ssp sss sy- syi syn syp sys yii yin yip yis ynn ynp yns yny yps ysi ysp yss ysy yys yyy