Task: Program Execution
Input (English): 2, 18, ['t', 'R', 'x', 'c', '4413', 'X', 't', 'I', '6461', 'o', '7313', '1375', '4567', '1967', '4495', '3873', 'L', '647', 'R', 'l', '1947', 'u', '5637', '9777']
Output (English): Rxc4413XtI6461o731313754567196744953873L647