Task: Program Execution
Input (English): 2, 9, ['1421', 'M', '8603', '9763', 'n', '123', 'W', '9241', 'I', 'i', 'u', '6919', '9825', 'I', 'm', '4497', 'J', 'R', '529', '3811']
Output (English): M, u, 3811