#include <iostream>
using namespace std;

int main() {
    
    int month;
    cin >> month;

    // write your code here......
    if(month > 12 or month < 1) cout << "不合法";
    else if(month >= 3 and month <= 5) cout << "春季";
    else if(month >= 6 and month <= 8) cout << "夏季";
    else if(month >= 9 and month <= 11) cout << "秋季";
    else if(month == 12 or month == 1 or month == 2)cout << "冬季";

    return 0;
}