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Consider all possible three letter combinations of the English alphabet. From AAA to ZZZ . There are 26 x 26 x 26 = 17,576 of them in all, or 626 per letter. Some of these are valid English words - you could use them in a game of Scrabble. For example, ACE , BAT , ZAG etc. IATA also assigns three letter codes to airports. You know, the ones you see on your boarding passes and baggage tags. Like…
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