#include <iostream>
using namespace std;
int main() {
int month;
cin >> month;
// write your code here......
if (month < 1 || month > 12) {
cout << "不合法" << endl;
} else {
switch (month) {
case 3 ... 5:
cout << "春季" << endl;
break;
case 6 ... 8:
cout << "夏季" << endl;
break;
case 9 ... 11:
cout << "秋季" << endl;
break;
default:
cout << "冬季" << endl;
}
}
return 0;
}



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