Task: Program Execution
Input (English): 1, 18, ['1141', 'x', 'p', '1111', 'o', 'f', 'e', 'c', 'M', '8637', '7799', '1247', 'a', 'r', 'F', 'Z', 'Y', '9517', '2149', 'I', '2351', 'z', '4013', '3389', 'C']
Output (English): 1141xp1111ofecM863777991247arFZY9517