brono[7], obron[7], oboro[7], norno[5],
bono[6], obon[6], bron[6], boro[6], robo[6], nono[4], norn[4], noro[4],
bon[5], bor[5], rob[5], non[3], ono[3], nor[3], oro[3],
bo[4], no[2], on[2], or[2], ro[2],
