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:
node_dict = {}
flag = True
mat = []
target = -1
n = int(input())
for t in range(n-1):
    u,v = map(int,input().split())
    mat.append((u,v))
    if flag:
        try:
            node_dict[u] += 1
            if node_dict[u] == 3:
                target = u
                flag = False
        except KeyError:
            node_dict[u] = 1
            
        try:
            node_dict[v] += 1
            if node_dict[v] == 3:
                target = v
                flag = False
        except KeyError:
            node_dict[v] = 1
            
edges = n-2
count = 0
for (u,v) in mat:
    if u == target or v == target:
        print(count)
        count += 1
    else:
        print(edges)
        edges -= 1