#include <iostream>
using namespace std;
int main() {
int month;
cin >> month;
// write your code here......
cout << (( month>12 || month <1) ? "不合法" : (month == 12)? "冬季": ( month >= 9 ) ? "秋季" : ( month >= 6) ? "夏季":( month>=3 )? "春季" : "冬季") << endl;
return 0;
}

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