def printtree(points):
    curry = 0
    prevx = 0
    s = ""
    for p in points:
        if p.y != curry:
            print(s)
            s = ""
            print()
            print()
            curry = p.y
            prevx = 0
        s += ' '*(p.x - prevx) + str(p.data.data[1][0])
        prevx = p.x + 1
    print(s)