map1

#include<iostream>
#include<map>
#include<string>
using namespace std;
int main()
{
  string s;
  map <string,int> month =
  {
    {"January",31},
    {"February",28},
    {"March",31},
    {"April",30},
    {"May",31},
    {"June",30},
    {"July",31},
    {"August",31},
    {"September",30},
    {"October",31},
    {"November",30},
    {"December",31}
  };
  while(1)
  {
    cin>>s;
    if(s=="exit")break;
    if(month[s]) cout<<month[s]<<endl;
    else cout<<"unknown month"<<endl;
  }
  return 0;
}