nested loop three

#include <iostream>

using namespace std;

main()
{
    int a, b;

    for (a=7; a >= 1; a--){
        for (b=a; b >= 1; b--){
            cout << (a-b) + 1;
        }

        cout << "\n";
    }
}

/**
1234567
123456
12345
1234
123
12
1
**/