Task: Program Execution
Input (English): 1, 4, ['E', '1641', '4621', 'M', '69', '5651', 'P', '1713', 'X', 'b', '5779', '3459', '5857', '631', 'r', 'a', '1133', 'o', 'W', 's', '1269']
Output (English): E16414621M