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:
import sys
n=int(input())
data=sys.stdin.readlines()
g=[[] for i in range(n)]
ribs=dict()
for i in range(n-1):
    v,u=map(int,data[i].split())
    v-=1
    u-=1
    ribs[frozenset([v,u])]=i
    g[v].append(u)
    g[u].append(v)
answer=[-1] *(n-1)
count=0
for v in range(n):
    if len(g[v])==1 and answer[ribs[frozenset([v,g[v][0]])]]==-1:
        answer[ribs[frozenset([v,g[v][0]])]]=count
        count+=1
for i in range(n-1):
    if answer[i]==-1:
        answer[i]=count
        count+=1
print(*answer,sep="\n")