#include <iostream>
using namespace std;
int main() {
int M = 1;
int N = 1;
for (int m = -M; m < M; ++m)
{
std::cout << "m: " << m << " ";
for (int n = -N; n < N; ++n)
{
std::cout << "n: " << n << " ";
}
std::cout << "\n";
}
return 0;
}
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