#include <iostream>
using namespace std;

int main() {

    int month;
    cin >> month;

    // write your code here......
    if (month < 1 || month > 12) {
        cout << "不合法" << endl;
    } else {
        switch (month) {
            case 3 ... 5:
                cout << "春季" << endl;
                break;
            case 6 ... 8:
                cout << "夏季" << endl;
                break;
            case 9 ... 11:
                cout << "秋季" << endl;
                break;
            default:
                cout << "冬季" << endl;
        }
    }

    return 0;
}