#include using namespace std;

int main() {

int month;
cin >> month;

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


return 0;

}