Notes
This function is in beta test. Please help improve it in the issues
here.
Hints
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.
Your Answer
A
ABA
ABCBA
ABCDCBA
ABCDEDCBA
ABCDEFEDCBA
ABCDEFGFEDCBA
ABCDEFGHGFEDCBA
ABCDEFGHIHGFEDCBA
ABCDEFGHIJIHGFEDCBA
ABCDEFGHIJKJIHGFEDCBA
ABCDEFGHIJKLKJIHGFEDCBA
ABCDEFGHIJKLMLKJIHGFEDCBA
ABCDEFGHIJKLMNMLKJIHGFEDCBA
ABCDEFGHIJKLMNONMLKJIHGFEDCBA
ABCDEFGHIJKLMNOPONMLKJIHGFEDCBA
ABCDEFGHIJKLMNOPQPONMLKJIHGFEDCBA
ABCDEFGHIJKLMNOPQRQPONMLKJIHGFEDCBA
ABCDEFGHIJKLMNOPQRSRQPONMLKJIHGFEDCBA
ABCDEFGHIJKLMNOPQRSTSRQPONMLKJIHGFEDCBA
ABCDEFGHIJKLMNOPQRSTUTSRQPONMLKJIHGFEDCBA
ABCDEFGHIJKLMNOPQRSTUVUTSRQPONMLKJIHGFEDCBA
ABCDEFGHIJKLMNOPQRSTUVWVUTSRQPONMLKJIHGFEDCBA
JOJ Answer
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
A B C D E F G H I J K L M N O N 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 O P O N 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 O P Q P