iii iin iio iip iis in- ini inn ino inp ins iny io- ioi ion ioo iop ios ipi ipn ipo ipp ips ipy is- isi isn iso isp iss isy iyo iys iyy n-i nii nin nio nip nis nni nnn nno nnp nns no- noi non noo nop nos noy npi npn npo npp nps nsi nsn nso nsp nss nsy nyn nyo nyp nys nyy o-i oii oin oio oip ois on- oni onn ono onp ons ony oo- ooi oon ooo oop oos op- opi opn opo opp ops opy os- osi osn oso osp oss oyi oyo oys p-p pii pin pio pip pis pn- pni pnn pno pnp pns pny poi pon poo pop pos poy ppi ppn ppo ppp pps ps- psi psn pso psp pss psy py- pyn pyo pys sii sin sio sip sis sni snn sno snp sns sny soi son soo sop sos soy spi spn spo spp sps spy ss- ssi ssn sso ssp sss sy- syi syn syp sys yii yin yio yip yis ynn ynp yns yny yoi yon yoo yop yos yoy ypo yps ysi yso ysp yss ysy yys yyy