Task: Program Execution
Input (English): 6, 6, ['2107', 'i', 'O', 'O', '7721', 'U', '4591', '5637', 't', '3637', 'G', '9129', 'c', '2811', 'W', 'p', 'c', '7495', '3719', 'T', '3305', '5679', 'b', 'F']
Output (English): U