Exists a bug where as long as two of the same characters exist in the colour code string when making a guess, the game prompts the user with the “there are no double values” message. However, duplicate characters in colour might actually exist. Suggested fix: only prompt for “no double values” if the same character is not repeated in the string AND the same characters does not appear twice in a row, I would guess the current logic has that statement set to an OR comparison