4 ms·

Reading the first problem, I think I am not ready for zero, it seems that the first problem is not well described.

• zheng 15y ago
  You are looking for a sequence of 5 characters that differ by one character, but are otherwise identical (order matters). For example, an answer would be something like '89^hf' and '8z^hf'
  • nottodayy 15y ago
    Thanks, order matters that's what I missed.