#include<iostream>
#include <vector>
#include<string>
using namespace std;
void season(int month) {
  switch(month) {
    case 12: case 1: case 2: cout<<"winter\n"; break;
    case 3: case 4: case 5: cout<<"spring\n"; break;
    case 6: case 7: case 8: cout<<"summer\n"; break;
    case 9: case 10: case 11: cout<<"fall\n"; break;
    default: cout<<"invalid month\n";
  } //switch
}//season

int main() {
  int month;
  cout<<"Enter the month:";
  cin>>month;
  season(month);
  system("pause");
  return 0;
}//main