#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;
}