iii iin iio iir iis in- ini inn ino inr ins io- ioi ion ioo ior ios ir- iri irn iro irr irs is- isi isn iso isr iss n-i nii nin nio nir nis nni nnn nno nns no- noi non noo nor nos nri nrn nro nrr nrs nsi nsn nso nsr nss o-i oii oin oio oir ois on- oni onn ono onr ons oo- ooi oon ooo oor oos or- ori orn oro orr ors os- osi osn oso osr oss rii rin rio rir ris rni rnn rno rnr rns roi ron roo ror ros rri rrn rrr rrs rsi rsn rso rsr rss sii sin sio sir sis sni snn sno snr sns soi son soo sor sos sr- sri srn sro srr srs ss- ssi ssn sso ssr sss