import java.io.*;

class CalendarChange 
{

 public static void main(String[] args) throws IOException
 {
  int d,m,y;
  String command;
  char ch;
  Calendar calendar;
  BufferedReader in = Text.open(System.in);
  for(;;)
     try
       {
        System.out.print("Enter day: ");
        d=Text.readInt(in);
        System.out.print("Enter month: ");
        m=Text.readInt(in);
        System.out.print("Enter year: ");
        y=Text.readInt(in);
        calendar = new Calendar(d,m,y);
        break;
       }
     catch(DateException e)
       {
        System.out.println("Invalid date "+e.getMessage());
       }
  System.out.print("Enter + or - to add or subtract ");
  System.out.println("followed by d, w, m, or y (or q to quit)");
  do
    {
     System.out.print("> ");
     command=Text.readString(in);
     ch=command.charAt(0);
     if(ch=='+')
        {
         ch=command.charAt(1);
         if(ch=='d')
            calendar.addDay();
         else if(ch=='w')
            for(int i=0;i<7;i++)
               calendar.addDay();
         else if(ch=='m')
            calendar.addMonth();
         else if(ch=='y')
            calendar.addYear();
         else if(ch!='q')
            System.out.println("Invalid command");
        }
     else if(ch=='-')
        {
         ch=command.charAt(1);
         if(ch=='d')
            calendar.subDay();
         else if(ch=='w')
            for(int i=0;i<7;i++)
               calendar.subDay();
         else if(ch=='m')
            calendar.subMonth();
         else if(ch=='y')
            calendar.subYear();
         else if(ch!='q')
            System.out.println("Invalid command");
        }
     else if(ch!='q')
        System.out.println("Invalid command");
     System.out.println(calendar);
    }
  while(ch!='q');
 }

}