#include <iostream>
#include <ostream>
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 == 1 || month == 2 || month == 12)
cout <<"冬季"<<endl;
else
cout <<"不合法"<<endl;
return 0;
}



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