#include <iostream>
using namespace std;
int main() {
int month;
cin >> month;
// write your code here......
if (month == 3 || month == 4 || month == 5)
cout << "春季" << endl;
else if (month == 6 || month == 7 || month == 8)
cout << "夏季" << endl;
else if (month == 9 || month == 10 || month == 11)
cout << "秋季" << endl;
else if (month == 12 || month == 1 || month == 2)
cout << "冬季" << endl;
else
cout << "不合法" << endl;
return 0;
}



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