🏁 Guess the country by the flag
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 The display shows a sequence of digits that you have to memorize and repeat.
 Every digit can appear only once in the number.
 You start with a sequence of two digits. The longest possible sequence is a sequence of ten digits.
 When you repeat the sequence of digits correctly twice in a row, the sequence is extended by one digit.
 If you repeat the sequence incorrectly twice in a row, the game is over.
 If a green light comes on next to display, it means that you will advance to the next level if you answer correctly. If a red light comes on next to display, it means that the game will be over if the answer is incorrect.
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