#include<bits/stdc++.h>
using namespace std;
const int N = 1e3+5;
vector<int> graph[N];
int main()
{
    int v,e,j,k;
    cin>>v>>e;
    for(int i=0;i<v;++i)
    {
        cin>>j>>k;
        graph[k].push_back(j);
        graph[j].push_back(k);
        
    }
}