public class SkillBuilder5
{
    // define your constants after this comment
    private final static int No_t = 0;
    private final static int One_t = 1;
    private final static int Yes_t_y = 2;
    // define your constants before this comment

    public static String findTYPattern(String s)
    {
        // add your code here.
        String str = " ";
        boolean isDone = false;
        int index = 0;
        int currentState = 0;

        while((index < s.length) && (!(isDone))){
         char ch = s.charAtIndex(index);
         index++;
         switch(currentState)
         {
          case(No_t):
          if(ch.toLowerCase(ch) == "t")
          {
             str = str + ch;
             currentState = One_t;
          }break;
          case(One_t):
          if(ch.toLowerCase(ch) == "y")
          {
             currentState = Yes_t_y;
          }
          str = str+ch;
          break;
          case(Yes_t_y):
          isDone = true;
          break;

         }
        }
    }
}