#include <iostream>
#include <algorithm>
using namespace std;
int main() {
string s1[12], s2[12];
for (int i = 0; i < 12; ++i) { cin >> s1[i] >> s2[i]; }
cout << (std::is_permutation(s1, s1 + 12, s2) ? "is permutation"
: "is not permutation");
}
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