/** 
Complete the solution so that it reverses
the string passed into it.

'world'  =>  'dlrow'
**/


public class Kata {

  public static String solution(String str) {
    // Your code here...
    return "";
  }

}

public class Kata {

  public static String solution(String str) {
    int len = str.length();
    StringBuilder dest = new StringBuilder(len);

    for (int i = (len - 1); i >= 0; i--){
        dest.append(str.charAt(i));
    }

    return dest.toString();
  }

}