#include <iostream>

int main()
{
    for( int outer = 0 ; outer < 3 ; ++outer )
    {
        std::cout << "outer: " << outer << '\n' ;

        for( int inner = 0 ; inner < 5 ; ++inner )
        {
            std::cout << "    inner: " << inner <<  " (outer:" << outer << ")\n" ;
        }

        std::cout << '\n';
    }
}