#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
 
void dodaj(vector<vector<int>>& adj, int x ,int y){
	adj[x].push_back(y);
	adj[y].push_back(x);
 
}
 
 
int main() {
int v;
cin>>v;
vector<vector<int>> adj(v);
int k,x,y;
cin>>k;
for(int i=0; i<k; i++){
	cin>>x>>y;
	dodaj(adj,x,y);
}
 
for(int i=0; i<v; i++){
	sort(adj[i].begin(), adj[i].end());
	cout<<"sasiedz "<<i<<" to ";
	for(int j: adj[i])
	cout<<j<<" ";
	cout<<endl;
 
}
	return 0;
}

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NSA3CjEgMgozIDIKMiA0CjEgMAowIDMKMSA0CjMgNA==

5 7
1 2
3 2
2 4
1 0
0 3
1 4
3 4