#include <iostream>
using namespace std;

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

    // 录入一个月份 month,判断属于哪个季节(3 - 5 月为春季、6 - 8 月为夏季、9 - 11 月为秋季、12,1,2 月为冬季)
    if(month == 3 || month == 4 || month == 5)  //注意是==,不是=
        cout << "春季";
    if(month == 6 || month == 7 || month == 8)
        cout << "夏季";
    if(month == 9 || month == 10 || month == 11)
        cout << "秋季";
    if(month == 12 || month == 1 || month == 2)
        cout << "冬季";
    if(month < 1 || month > 12)
        cout << "不合法";
    return 0;
}