public class Words
{
   /**
      Computes a string that repeats every letter 't' in the original string.
      @param s any string
      @return a string with the same characters as s, except that every letter 't' is repeated
   */
   public String stutter(String s)
   {
      String newStr = "";
      for(int i = 0; i < s.length(); i++)
      {
         if(s.charAt(i) == 't'){newStr += "tt";}
         else{newStr += s.charAt(i);}
      }
      return newStr;
   }
}