import java.io.PrintStream;
import java.util.LinkedHashMap;
import java.util.Map;
import java.util.Scanner;

public class DaysInMonth
{
   public static void main(String[] args)
   {
      PrintStream output = System.out;
      
      Map<String, Integer> daysInMonth = new LinkedHashMap<String, Integer>();
      daysInMonth.put("Jan", 31);
      daysInMonth.put("Feb", 28);
      daysInMonth.put("Mar", 31);
      daysInMonth.put("Apr", 30);
      daysInMonth.put("May", 31);
      daysInMonth.put("Jun", 30);
      daysInMonth.put("Jul", 31);
      daysInMonth.put("Aug", 31);
      daysInMonth.put("Sep", 30);
      daysInMonth.put("Oct", 31);
      daysInMonth.put("Nov", 30);
      daysInMonth.put("Dec", 31);
      
      Integer days = daysInMonth.get(args[0]);
      if (days != null)
      {
      	output.println(args[0] + " has " + days + " days");
      }
   }
}