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1994-1995 ACM International Collegiate Programming Contest
Western European Regional
With the introduction of computers in today's life, typing skills are essential for all. As a
result, one of the typing teachers has a booming business. Yesterday, however, she made the
mistake of specifying the following test for her students: 'Type lines of 26 characters each,
such that each letter in the alphabet occurs exactly once'.
Now that she sits at home and wants to mark the tests, she has discovered that instead of
typing the alphabet in order, most took the liberty to type any permutation of the alphabet.
What she would like you to do, is write a program which marks the test for her, meaning
that you have to check for each line of characters whether it is correct, i.e., it is a permutation
of the 26 lowercase letters of the alphabet.
The first line of input contains an integer N specifying the number of test cases. Each test
case is one line of text, no longer than 80 characters.
For each test case, you should create a single line of output. The line should read '
OK.' if the
input line is exactly a permutation of the 26 lowercase letters of the alphabet, and '
it is not.
zyxwvutsrqponm and so on
And now, for something completely different.
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Last updated November 11, 1997