#include <iostream>
using namespace std;

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

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

    return 0;
}