import java.util.Scanner;

/**
 * Reads in a social security number (SSN), formatted as XXX-XX-XXXX, where the X's
 * represent digits. Adds 1 to that number and prints the result in the same
 * format.
 * 
 * @author pollen
 */
public class NextSsn {
    public static void main(String[] args) {
        
        Scanner in = new Scanner(System.in);
        
        System.out.print("Enter a social security number " +
                "in the format XXX-XX-XXXX: ");
        String ssnText = in.next();
        
        // Parse out the digit blocks from the SSN.
        String firstBlock = ssnText.substring(0, 3);
        String secondBlock = ssnText.substring(4, 6);
        String thirdBlock = ssnText.substring(7);
        
        // Parse and combine the blocks into a single integer. We could do this by
        // concatenating them as strings and then parsing, or we could parse each
        // one individually and then combine them, using powers of 10 to shift the
        // digits as necessary. We choose the former approach here.
        int ssn = Integer.parseInt(firstBlock + secondBlock + thirdBlock);
        
        // Increment the SSN.
        ssn++;
        
        // Convert the new SSN into text. Use String.format to make sure the number is
        // zero-padded to 9 digits. We will cover this in briefly in Friday's lecture.
        ssnText = String.format("%09d", ssn);
        
        // Break out the digit blocks from the new SSN.
        firstBlock = ssnText.substring(0, 3);
        secondBlock = ssnText.substring(3, 5);
        thirdBlock = ssnText.substring(5);
        
        // Print the result, inserting hyphens.
        System.out.println(firstBlock + "-" + secondBlock + "-" + thirdBlock);
    }
}