grant, can you please add an example to explain how you dealt with the multiplier and 'existing_letter' in this problem?
It seems that "existing_letter" is fixed on 8th position.
@Jan, thanks :)
That is correct. I've added the 8th position fixed point to the description. I've also fixed one of the multiplier strings in the test cases that was accidentally 16 instead of 15 characters long (it's hard to distinguish between three versus four spaces).
Are you also assuming that the length of the word is no more that 8 if the "existing_letter" is either the first or the last letter of the word? Also, if the "existing_letter" is the middle letter of the word, then the length or the word is assumed to be no more than 15. Is that right?
The assumption (I thought this was explicitly stated in a previous problem) is that we're following Scrabble rules, which involve seven tiles per player. That being the case, eight letters is the longest word that can be played, and the existing letter can range anywhere from the first to the last letter of the word. The 15-character window simply represents all the tiles that can be played on (existing tile plus seven to each side). The word will be played at some point in that 15-character window, though no longer than eight characters.
Thanks for the clarification!
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