How to check the code

　　I wrote a simple question, but WA three times, and found that all array size and did not open enough relationship, so in this stand stickers to record your own SB error.

For a class letters deal with the problem:

　　1, if we want to digital conversion of the letter, note corresponding to the array 27 must be open to the above, since it is difficult to ensure that data is not included Z