import java.util.Comparator;

class Date implements Comparator  
{
	private int day, month, year;
	
	public Date(String str) throws IllegalMonthException
	{
		//format of str is DD-MM-YY
		
		String day=str.substring(0,2);
		String month=str.substring(3,5);
		String year=str.substring(6,8);
		this.month=Integer.parseInt(month);
		if(this.month>12||this.month<1) throw new IllegalMonthException();
	}
	public int compare(Object o1, Object o2) 
	{
	
	}
	public boolean equals(Object o) 
	{
	
	}
	public String toString() 
	{
		/* prints a date in the following format:
		day-month-year (in four digits)
		*/
	}
}