bot[6], bon[5], bor[5], rob[5], pot[5], top[5], por[4], pro[4], rop[4], not[4], ton[4], ort[4], rot[4], tor[4], nor[3], won[3], rwo[3],
bo[4], op[3], po[3], ot[3], to[3], no[2], on[2], or[2], ro[2],