#include <iostream>
using namespace std;

int main() {
	int n, m;
	cin>>n>>m;
	int graph[n][n];
	for(int i=0;i<m;i++){
		int x,y;
		cin>>x>>y;
		graph[x][y]=1;
		graph[y][x]=1;
	}
	for(int i=0;i<n;i++){
		for(int j=0;j<n;j++){
			if(graph[i][j]==1){
				cout<<"("<<i<<" "<<j<<")";
			}
		}
		cout<<"\n";
	}
	return 0;
}