#include <bits/stdc++.h>
using namespace std;
int main() {
int n, is_inner ;
cin >> n >> is_inner;
if(n < 0 || n > 20 || (is_inner != 0 && is_inner != 1)) {
cout << "INVALID" << endl;
return 0;
}
if(is_inner) {
cout << "0đ" << endl;
} else {
if(n <= 5) {
cout << "15000đ" << endl;
} else {
cout << "0đ" << endl;
}
}
return 0;
}
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