Task: Program Execution
Input (English): 12, 20, ['1569', 'z', 'X', 'u', 'j', '3509', '8555', '9473', 'R', '1447', '7237', 'E', '2391', '5415', 'Q', '6967', 'C', '5305', '1775', '6669', '5079']
Output (English): 666917755305C6967Q54152391E