// Imports
import java.*;
import java.awt.*;
import java.io.*;
import java.util.*;
import java.lang.*;
import java.text.*;


class DateParse
{
	// * Variables
	public String[] m_strMonths = { "January", "February", "March", "April", "May", "June", "July", "August", "September", "October", "November", "December" };
	
	
	// * Constructor
	public DateParse() 
	{
	}

	// * Main
	public static void main(String args[]) 
	{     
		// Declare variables
		DateParse dpParse = new DateParse();  
		
		// Run
		dpParse.Run();
		
		// Exit
		System.exit(1);
	}
	
	// * Run
	public void Run()
	{
		// Declare variables
        NumberFormat nfFormat = NumberFormat.getInstance();
        StreamTokenizer stTokens = new StreamTokenizer(new BufferedReader(new InputStreamReader(System.in)));
        String strInput = new String("");
        BufferedReader brInput = new BufferedReader(new InputStreamReader(System.in));
        
        // Setup tokenizer
        stTokens.eolIsSignificant(true);
        
        // Prompt
        System.out.print("Enter a date in form MM/DD/YY or MM DD, YYYY: ");	
        
        // Try
        try
        { 	                	
            // -- Get user input
            strInput = brInput.readLine();
            
            // -- Parse
            Parse(strInput);            
        }
        catch (IOException ioExcept)
        {
            System.out.println("\n\nError: " + ioExcept.toString() + "!\n\n");
            System.exit(1);
        }  		
	}
	
	// * Handle invalid input
	public void InvalidInput()
	{
		System.out.println("\n\nError: Invalid input.\n\n");
		System.exit(1);		
	}
	
	// * Parse
	public void Parse(String strInput)
	{
		// Declare variables
		
		// Validate
		if (strInput.length() == 0)
		{
			InvalidInput();
		}
		
		// See what mode we are in
		if (IsNumeric(strInput.charAt(0)) == true)
		{
			ParseNumeric(strInput);
		}
		else
		{
			ParseString(strInput);
		}
	}
	
	// * Determines if a character is numeric
	public boolean IsNumeric(char cChar)
	{
		// Validate
		return Character.isDigit(cChar);
	}
	
	// * Determines if a string is numeric
	public boolean IsNumeric(String strString)
	{
		// Validate
        for (int i = 0; i < strString.length(); i++)
        {
            if (Character.isDigit(strString.charAt(i)) == false) 
            {
				return false;
            }
        }	
        
        return true;
	}	
	
	// * Parse numeric
	public void ParseNumeric(String strInput)
	{
		// Declare variables
		StringBuffer strBuffer = new StringBuffer(strInput);
		StringBuffer strOutput = new StringBuffer("");
		String strTemp;
		int nFindStart = 0, nFindEnd = 0;
		Integer nTemp;
		
		// Get the month
		nFindEnd = strBuffer.indexOf("/", nFindStart);
		if (nFindEnd == -1)
		{
			InvalidInput();
		}
		strTemp = strBuffer.substring(nFindStart, nFindEnd);
		// -- Validate
		if (IsNumeric(strTemp) == false)
		{
			InvalidInput();
		}
		if (ValidateMonth(new Integer(strTemp)) == false)
		{
			InvalidInput();
		}
		// -- Convert month
		nTemp = new Integer(strTemp);
		strOutput.append(ConvertMonth(nTemp.intValue()) + " ");
		
		// Switch start and end
		nFindStart = nFindEnd + 1;
		
		// Get day
		nFindEnd = strBuffer.indexOf("/", nFindStart);
		if (nFindEnd == -1)
		{
			InvalidInput();
		}	
		strTemp = strBuffer.substring(nFindStart, nFindEnd);
		// -- Validate
		if (IsNumeric(strTemp) == false)
		{
			InvalidInput();
		}			
		// -- Append
		strOutput.append(strTemp + ", ");
		
		// Switch start and end
		nFindStart = nFindEnd + 1;
		
		// Get year	
		strTemp = strBuffer.substring(nFindStart);
		// -- Validate
		if (IsNumeric(strTemp) == false)
		{
			InvalidInput();
		}		
		nTemp = new Integer(strTemp);
		// -- Append
		if (strTemp.length() == 2)
		{
			if (nTemp.intValue() <= 2)
			{
				strOutput.append("20" + strTemp);
			}
			else
			{
				strOutput.append("19" + strTemp);	
			}	
		}
		else
		{
			strOutput.append(strTemp);
		}
			
		
		// Output
		System.out.println("\n\n" + strOutput.toString() + "\n\n");		
	}
	
	// * Parse string
	public void ParseString(String strInput)
	{
		// Declare variables
		StringBuffer strBuffer = new StringBuffer(strInput);
		StringBuffer strOutput = new StringBuffer("");
		String strTemp;
		int nFindStart = 0, nFindEnd = 0;
		Integer nTemp;	
		
		// Get the month
		nFindEnd = strBuffer.indexOf(" ", nFindStart);
		if (nFindEnd == -1)
		{
			InvalidInput();
		}
		strTemp = strBuffer.substring(nFindStart, nFindEnd);
		// -- Validate
		nTemp = new Integer(ValidateMonth(strTemp));
		if (nTemp.intValue() == -1)
		{
			InvalidInput();
		}
		// -- Append
		strOutput.append(nTemp.toString() + "/");
		
		// Switch start and end
		nFindStart = nFindEnd + 1;		
		
		// Get day
		nFindEnd = strBuffer.indexOf(", ", nFindStart);
		if (nFindEnd == -1)
		{
			InvalidInput();
		}
		strTemp = strBuffer.substring(nFindStart, nFindEnd);
		// -- Append
		strOutput.append(strTemp + "/");
		
		// Switch start and end
		nFindStart = nFindEnd + 2;		
		
		// Get year	
		strTemp = strBuffer.substring(nFindStart);
		// -- Validate
		if (IsNumeric(strTemp) == false)
		{
			InvalidInput();
		}		
		// -- Append	
		strOutput.append(strTemp);							
		
		// Output
		System.out.println("\n\n" + strOutput.toString() + "\n\n");			
	}	
	
	// * Convert month
	public String ConvertMonth(int nMonth)
	{
		// Convert
		return m_strMonths[nMonth - 1];
	}
		
	
	// * Validate month
	public boolean ValidateMonth(Integer nMonth)
	{		
		// Validate
		if (nMonth.intValue() >= 1 || nMonth.intValue() <= 12)
		{
			return true;
		}
		
		return false;	
	}
	
	// * Validate month
	public int ValidateMonth(String strMonth)
	{
		
		// Go through all months
		for (int i = 0; i < m_strMonths.length; i++)
		{
			if (m_strMonths[i].equalsIgnoreCase(strMonth) == true)
			{
				return i + 1;
			}	
		}
		
		return -1;
	}	
	
}