#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;
}