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:
n = int(input())
a = [0] * (n)
b = [0] * (n)
c = [0] * (n + 1)
d = [-1] * (n + 1)
for i in range(n - 1):
    a[i], b[i] = map(int, input().split())
    c[a[i]] += 1
    c[b[i]] += 1
ok = 0
k = 0
for i in range(1, n + 1):
    if c[i] > 2:
        ok = 1
        for j in range(n - 1):
            if a[j] == i or b[j] == i:
                d[j] = k
                k += 1
        break
    
for j in range(n - 1):
    if d[j] == -1:
        print(k)
        k += 1
    else:
        print(d[j])