Problem: You are given a directed graph G which can contain loops (edges from a vertex to itself). Multi-edges are absent in G which means that for all ordered pairs (u, v) exists at most one edge from u to v. Vertices are numbered from 1 to n.

A path from u to v is a sequence of edges such that:

  * vertex u is the start of the first edge in the path; 
  * vertex v is the end of the last edge in the path; 
  * for all pairs of adjacent edges next edge starts at the vertex that the previous edge ends on. 



We will assume that the empty sequence of edges is a path from u to u.

For each vertex v output one of four values:

  * 0, if there are no paths from 1 to v; 
  * 1, if there is only one path from 1 to v; 
  * 2, if there is more than one path from 1 to v and the number of paths is finite; 
  * -1, if the number of paths from 1 to v is infinite. 



Let's look at the example shown in the figure.

<image>

Then:

  * the answer for vertex 1 is 1: there is only one path from 1 to 1 (path with length 0); 
  * the answer for vertex 2 is 0: there are no paths from 1 to 2; 
  * the answer for vertex 3 is 1: there is only one path from 1 to 3 (it is the edge (1, 3)); 
  * the answer for vertex 4 is 2: there are more than one paths from 1 to 4 and the number of paths are finite (two paths: [(1, 3), (3, 4)] and [(1, 4)]); 
  * the answer for vertex 5 is -1: the number of paths from 1 to 5 is infinite (the loop can be used in a path many times); 
  * the answer for vertex 6 is -1: the number of paths from 1 to 6 is infinite (the loop can be used in a path many times). 

Input

The first contains an integer t (1 ≤ t ≤ 10^4) — the number of test cases in the input. Then t test cases follow. Before each test case, there is an empty line.

The first line of the test case contains two integers n and m (1 ≤ n ≤ 4 ⋅ 10^5, 0 ≤ m ≤ 4 ⋅ 10^5) — numbers of vertices and edges in graph respectively. The next m lines contain edges descriptions. Each line contains two integers a_i, b_i (1 ≤ a_i, b_i ≤ n) — the start and the end of the i-th edge. The vertices of the graph are numbered from 1 to n. The given graph can contain loops (it is possible that a_i = b_i), but cannot contain multi-edges (it is not possible that a_i = a_j and b_i = b_j for i ≠ j).

The sum of n over all test cases does not exceed 4 ⋅ 10^5. Similarly, the sum of m over all test cases does not exceed 4 ⋅ 10^5.

Output

Output t lines. The i-th line should contain an answer for the i-th test case: a sequence of n integers from -1 to 2.

Example

Input


5

6 7
1 4
1 3
3 4
4 5
2 1
5 5
5 6

1 0

3 3
1 2
2 3
3 1

5 0

4 4
1 2
2 3
1 4
4 3


Output


1 0 1 2 -1 -1 
1 
-1 -1 -1 
1 0 0 0 0 
1 1 2 1 

Solution (in CPP):

Solution:
//cf1547G
//https://blog.csdn.net/weixin_46113968 20210714
//path number,0,1,more
#include<iostream>
#include<vector>
using namespace std;
const int maxn=4e5+5;
int n,m,vis[maxn],a[maxn];
vector<int>vc[maxn];
void dfs(int x,int now)
{
	if(now)//mark loop
		a[x]=-1;
	else if(a[x]<2)//one more road
		a[x]++;
	vis[x]=1;//mark visited
	for(auto y:vc[x])//each next vertice y
	{
		if(a[y]==-1)//next loop fornmed,next vertice
			continue;
		if(vis[y]||now)//visited or loop formed
			dfs(y,1);
		else if(a[y]<2)//continue to find
			dfs(y,now);
	}
	vis[x]=0;//x go back
}
int main()
{
	int t,x,y;
	cin>>t;
	while(t--)//case number
	{
		cin>>n>>m;//line number,vertice number
		for(int i=1;i<=n;i++)//clear,a as 0,vis as 0
		{
			vc[i].clear();
			a[i]=0;
			vis[i]=0;
		}
		while(m--)//each line
		{
			cin>>x>>y;
			vc[x].push_back(y);
		}
		dfs(1,0);
		for(int i=1;i<=n;i++) 
			cout<<a[i]<<' ';
		cout<<endl;
	}
	return 0;
}