Problem: You are given a tree consisting of n nodes. You want to write some labels on the tree's edges such that the following conditions hold:

  * Every label is an integer between 0 and n-2 inclusive. 
  * All the written labels are distinct. 
  * The largest value among MEX(u,v) over all pairs of nodes (u,v) is as small as possible. 



Here, MEX(u,v) denotes the smallest non-negative integer that isn't written on any edge on the unique simple path from node u to node v.

Input

The first line contains the integer n (2 ≤ n ≤ 10^5) — the number of nodes in the tree.

Each of the next n-1 lines contains two space-separated integers u and v (1 ≤ u,v ≤ n) that mean there's an edge between nodes u and v. It's guaranteed that the given graph is a tree.

Output

Output n-1 integers. The i^{th} of them will be the number written on the i^{th} edge (in the input order).

Examples

Input


3
1 2
1 3


Output


0
1


Input


6
1 2
1 3
2 4
2 5
5 6


Output


0
3
2
4
1

Note

The tree from the second sample:

<image>

Solution (in PYTHON3):

Solution:
from sys import stdin

n = int(stdin.readline())
link_dic = {}

link_list = []
link_time = [0 for i in range(n)]

for i in range(n - 1):
    x, y = map(int, stdin.readline().split())
    link_time[x-1] += 1
    link_time[y-1] += 1
    link_list.append([x, y])
spe_index = 0
ord_index = n - 2
for x, y in link_list:
    if link_time[x-1] == 1 or link_time[y-1] == 1:
        print(spe_index)
        spe_index += 1
    else:
        print(ord_index)
        ord_index -= 1