#include <bits/stdc++.h>
using namespace std;
 
int main() {
	// your code goes here
	int n, m;
	cin >> n >> m;
	vector<vector<int>> matrix(n+5);
 
	for (int i = 1; i <= m; i++){
		int a, b;
		cin >> a >> b;
		matrix[a].push_back(b);
		matrix[b].push_back(a);
	}
 
	int source = 1; // here we are taking source as 1 because our input will be as source 1.
	// this source will only work with our input.
	// for another input we have to change our source.
 
	// vector<int> used(n+5,0);
	unordered_map<int, int> used;
	queue<int> q;
	q.push(source);
 
	used[source] = 1;
	vector<int> leaves;
 
	while(!q.empty()){
		int removed = q.front();
 
		q.pop();
		int count = 0;
 
		for (int i : matrix[removed]){
			if(used[i] == 0){
				q.push(i);
				used[i] = 1;
				count += 1;
			}
		}
 
		if(count == 0) leaves.push_back(removed);
 
		cout << "The children of node " << removed << " are: " << count << endl;
	}
 
	cout << endl << "The leaf Nodes are:- " << endl;
 
	for (int i : leaves){
		cout << i << " ";
	}
 
 
	return 0;
}

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