#include <iostream>
using namespace std;

int main() {
    
    int month;
    cin >> month;
    if(month >= 3 && month <= 5)
    cout<<"春季";
    else if(month >= 6 && month <= 8)
    cout<<"夏季";
    else if(month >= 9 && month <= 11)
    cout<<"秋季";
    else if(month ==1 || month ==2 || month == 12)//不宜组合,就用或来分开
    cout<<"冬季";
    else
    cout<<"不合法";
    

    return 0;
}