Task: Program Execution
Input (English): 1, 21, ['X', '1277', 'M', 'g', 'C', 'q', '8331', '7401', '7613', 'B', 'D', 'A', '691', '8811', '7707', '6567', 'e', 'y', '853', 'J', 'i', 'n']
Output (English): iJ358ye765670771188196ADB316710471338qCgM7721X