Task: Program Execution
Input (English): 1, 3, ['M', '591', 'J', 'v', '855', '7181', 'a', '8053', '5223', '5543', '213', '3475', 'u', '533', '4043', '6995', '1007', 'O']
Output (English): M, v, a, 5543, u, 6995