import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.StringTokenizer;

public class GraphInput 
{
	public static void main(String[] args) throws IOException 
	{
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		String inputLine = br.readLine();
		String token = " "; //token delimiter
		StringTokenizer st = new StringTokenizer(inputLine,token);
		
		int m = Integer.parseInt(st.nextToken());
		int n = Integer.parseInt(st.nextToken()); // take care u cant call this repeatedly
		
		// use st.hasMoreTokens() for doing in a loop		
	}
}