/* package whatever; // don't place package name! */

import java.util.*;
import java.lang.*;
import java.io.*;

/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		reverseStringAfterAComma rsac = new reverseStringAfterAComma();
        String str = "grdwe,erwd";
        rsac.reverseMethod(str);
	}
	public static class reverseStringAfterAComma {

        public void reverseMethod(String word) {
            char ch1 = ' ';
            char ch2 = ' ';
            String result = "";
            for (int a = 0; a < word.length(); a++) {
                if (word.charAt(a) == ',') {
                    for (int i = word.length() - 1; i > a; i--) {
                        ch1 = word.charAt(i);
                        result += ch1;
                    }
                    for (int j = 0; j < a; j++) {
                        ch2 = word.charAt(j);
                        result += ch2;
                    }
                }
            }

            System.out.println(result);
        }
    }
}