bobo[8], dobo[7], boot[7], bort[7], torb[7], boro[6], robo[6], odro[5], ordo[5], root[5], roto[5], toro[5], wodo[5],
bob[7], bod[6], bot[6], bor[5], rob[5], odo[4], odr[4], ord[4], rod[4], oto[4], ort[4], rot[4], tor[4], oro[3], owo[3], rwo[3],
bo[4], do[3], od[3], ot[3], to[3], or[2], ro[2],