using System;

public class Program
{
    static void Main(){

        var a=3;
        var b=7;

        int n1=a, n2=n1+1, n3=n2+1, n4=n3+1;
        var count=0;
        for(; n1<=n2; n1++){
            for(; n2<=n3; n2++){
                for(;n3<=n4;n3++){
                    for(;n4<=b;n4++){
                        Console.WriteLine($"{n1} {n2} {n3} {n4}");
                        count++;
                    }
                }
            }
        }
        Console.WriteLine(count);
    }
}