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import java.util.StringTokenizer;

public class string13{

public static void main(String[] args) {

String s = "555-666-1234";

StringTokenizer t = new StringTokenizer(s,"-");

String s1 = t.nextToken();

String s2 = t.nextToken();

String s3 = t.nextToken();

StringBuffer sb = new StringBuffer();

sb.append(s1.substring(0, s1.length()-1)).append('-');

sb.append(s1.charAt(s1.length()-1)).append(s2.charAt(0)).append('-');

sb.append(s2.substring(1, s2.length())).append(s3.charAt(0)).append('-');

sb.append(s3.substring(1, s3.length()));

System.out.println(sb.toString());

}

}