class Tower():
    def __init__(self, name, disks):
        self.disks = disks
        self.name = name

def move(from_tower, to_tower):
    i_from = len(from_tower.disks)-1 
    i_to = len(to_tower.disks)-1 
    if to_tower.disks == [] or to_tower.disks[i_to] > from_tower.disks[i_from]: 
        to_tower.disks.append(from_tower.disks.pop(i_from))