Word generator
If we defined "Word" as a combination of 3 letters, and any letter could appear one, two or three times in the same word.
Then how many words can we get from English letters ?
Hint:
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words don't have to be meaningful consider Abc as a word and Aaa, Dbd and so on..
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there are 26 letter in English.
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divide the words into 3 categories so you could calculate their sum easily.
The answer is 17576.
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