Task: Program Execution
Input (English): 1, 11, ['J', '4153', '7823', 'u', '6021', '8805', 'c', '4793', '9315', 'T', 'b', 'G', '8681', 'Y', 's', 'o', 'Z', 'x', '4363', '7539', 'r', 'T']
Output (English): J, G