iii iin iio iip iis iix in- ini inn ino inp ins inx iny io- ioi ion ioo iop ios ipi ipn ipo ipp ips ipx ipy is- isi isn iso isp iss isy ixi ixn ixy iyo iys iyy n-i nii nin nio nip nis nix nni nnn nno nnp nns no- noi non noo nop nos nox noy npi npn npo npp nps nsi nsn nso nsp nss nsx nsy nyn nyo nyp nys nyx nyy o-i oii oin oio oip ois on- oni onn ono onp ons onx ony oo- ooi oon ooo oop oos oox op- opi opn opo opp ops opx opy os- osi osn oso osp oss osx ox- oxi oxn oxo oxx oxy oyi oyo oys p-p pii pin pio pip pis pix pn- pni pnn pno pnp pns pnx pny poi pon poo pop pos pox poy ppi ppn ppo ppp pps ppx ps- psi psn pso psp pss psx psy pxs py- pyn pyo pys pyx sii sin sio sip sis six sni snn sno snp sns sny soi son soo sop sos sox soy spi spn spo spp sps spx spy ss- ssi ssn sso ssp sss ssx sxi sxn sxs sy- syi syn syp sys syx xii xin xio xis xix xno xns xoi xon xoo xop xos xox xpn xpo xpp xps xsi xsp xss xxi xxo xxp xxx xxy xyp xyy yii yin yio yip yis ynn ynp yns yny yoi yon yoo yop yos yox yoy ypo yps ysi yso ysp yss ysy yxy yys yyy