#include <iostream>
using namespace std;
int main() {
int N = 20;
for (int i = 1; i < N; i = i + 1 + ((i + 1) % 3 == 0)) {
cout << i << ' ';
}
cout<<'\n';
for (int i = 1; i < N; i = i + 2 + 2 * ((i + 2) % 3 == 0)) {
//instructions
cout << i << ' ';
}
return 0;
}
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