#include <iostream>
using namespace std;

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

    // write your code here......
    if(3<=month&&month<=5){
        cout<<"春季"<<endl;
    }
    else if(6<=month&&month<=8){
        cout<<"夏季"<<endl;
    }
    else if(9<=month&&month<=11){
        cout<<"秋季"<<endl;
    }
    else if(month==12||month==1||month==2){
        cout<<"冬季"<<endl;
    }
    else{
        cout<<"不合法"<<endl;
    }

    return 0;
}