Given a 16x2 input character hexadecimal array representing the AES state, execute the AES algorithm MixColumns() transformation and output a 16x2 character hexadecimal array.
Refer to this link: https://csrc.nist.gov/csrc/media/publications/fips/197/final/documents/fips-197.pdf
For example:
stateI=['e3';'38';'2d';'8e';'60';'8d';'3e';'38';'15';'f4';'a7';'88';'e3';'f4';'06';'1a']; stateO=['36';'6a';'08';'2c';'4a';'1b';'d9';'63';'02';'9c';'37';'67';'c6';'00';'35';'f8'];
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