bbbb bbbs bbin bibb bibi bibs biin biis bin- bini binn bins biny bis- biss bisy biys bnib bnin bnss bsin bsns bysb bysi byss bysy i-by ibis ibns ibsn ibss ibyi iiii iiis iisi inby inis inni inns inny inss isbn isin isis issi isss issy isys n-ii nibi nibs nini nins nisi niss niyi nnnn nnss nsin nsis nssb nsss nyny nyss s-ib s-ii sbbs sbsi sibi sibs siby sini sinn sins siny sisi siss sisy siyi snib snns snsy snys ssbn ssby ssin ssis ssns sssb sssi ssss syis syn- syns syny syss ybbs yins yiss ysby ysii ysyb yyyy