#include <iostream>
#include <utility>
using namespace std;
struct wave{
int k;
int L;
};
wave foo(){
return {5,6};
}
std::pair<int,int> foo2(){
return std::make_pair(4,5);
}
int main() {
wave w = foo();
std::pair<int,int> a = foo2();
cout << w.k << " " << w.L << endl;
cout << a.first << " " << a.second << endl;
return 0;
}
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