Task: Program Execution
Input (English): 2, ['A', 'T', 'a', '2753', '6521', '9263', '5713', 'u', '5503', '611', 'h', 'J', '425', '3751', 'O', '5629', '285', 'j', 'Q', 'E', '5579', '6673']
Output (English): A, T