Record Case Detail

This function is in beta test. Please help improve it in the issues here.

Your answer may be identical to the JOJ answer in the first several lines.

However, you will still get Wrong Answer because the complete output may be longer and there might be errors in the future lines.

Please double check your code to solve this problem and try again.

             A
            ABA
           ABCBA
          ABCDCBA
         ABCDEDCBA
        ABCDEFEDCBA
       ABCDEFGFEDCBA
      ABCDEFGHGFEDCBA
     ABCDEFGHIHGFEDCBA
    ABCDEFGHIJIHGFEDCBA
   ABCDEFGHIJKJIHGFEDCBA
  ABCDEFGHIJKLKJIHGFEDCBA
 ABCDEFGHIJKLMLKJIHGFEDCBA
ABCDEFGHIJKLMNMLKJIHGFEDCBA

                          A
                        A B A
                      A B C B A
                    A B C D C B A
                  A B C D E D C B A
                A B C D E F E D C B A
              A B C D E F G F E D C B A
            A B C D E F G H G F E D C B A
          A B C D E F G H I H G F E D C B A
        A B C D E F G H I J I H G F E D C B A
      A B C D E F G H I J K J I H G F E D C B A
    A B C D E F G H I J K L K J I H G F E D C B A
  A B C D E F G H I J K L M L K J I H G F E D C B A
A B C D E F G H I J K L M N M L K J I H G F E D C B A

Notes

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JOJ Answer