#include <iostream>
using namespace std;
int main() {
int month;
cin >> month;
if(month >= 3 && month <= 5)
cout<<"春季";
else if(month >= 6 && month <= 8)
cout<<"夏季";
else if(month >= 9 && month <= 11)
cout<<"秋季";
else if(month ==1 || month ==2 || month == 12)//不宜组合,就用或来分开
cout<<"冬季";
else
cout<<"不合法";
return 0;
}

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