Task: Program Execution
Input (English): 19, 21, ['3925', '6949', '699', '2155', '907', '5649', '1059', '3903', '729', '537', 'u', '139', 'f', 'C', '47', 'C', 'I', '3583', '5599', 'e', '8373', '8447', 'A', 'S', '411', '4451']
Output (English): 8373, e, 5599