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OpenStudy (anonymous):
A palindrome is a string whose reversal is identical to the string. For instance, the strings: POP, CIVIC, RADAR, and REVIVER are palindromes. How many different strings over uppercase alphabet (A to Z) of length 9 are not palindromes?
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OpenStudy (unklerhaukus):
every nine character palindrome is definable by the first 5 characters
OpenStudy (unklerhaukus):
how many different, 5 character strings are there?
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