#include <iostream>
using namespace std;

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

    // write your code here......
    switch(month) {
        case 3:
        case 4:
        case 5:
            cout << "春季";
            break;
        case 6:
        case 7:
        case 8:
            cout << "夏季";
                break;
        case 9:
        case 10:
        case 11:
            cout << "秋季";
                break;
        case 12:
        case 1:
        case 2:
            cout << "冬季";
            break;
        default:
            cout << "不合法";
            break;
    }

    return 0;
}