bug[9], gub[9], buc[8], bud[8], cug[8], dug[8], cud[7], obu[7], cob[6], bod[6], dog[6], duo[6], udo[6], dwu[6], cod[5], doc[5],
bu[6], gu[6], ud[5], bo[4], go[4], wu[4], co[3], do[3], od[3],