iii iin iir iis iix in- ini inn inr ins inx iny ir- iri irn irr irs irx iry is- isi isn isr iss isy ixi ixn ixy iyr iys iyy n-i nii nin nir nis nix nni nnn nns nri nrn nrr nrs nrx nry nsi nsn nsr nss nsx nsy nyn nys nyx nyy rii rin rir ris rix riy rni rnn rnr rns rny rri rrn rrr rrs rsi rsn rsr rss rsx rxr rxs ry- ryn ryr rys ryy sii sin sir sis six sni snn snr sns sny sr- sri srn srr srs srx sry ss- ssi ssn ssr sss ssx sxi sxn sxs sy- syi syn syr sys syx xii xin xis xix xns xrx xry xsi xss xxi xxx xxy xyr xyy yii yin yir yis ynn yns yny yrn yrs ysi ysr yss ysy yxy yys yyy