bont[7], bort[7], torb[7], bron[6], ront[5], tron[5],
cob[6], bot[6], bon[5], bor[5], rob[5], noc[4], not[4], ton[4], ort[4], rot[4], tor[4], nor[3],
bo[4], co[3], ot[3], to[3], no[2], on[2], or[2], ro[2],
