Task: Program Execution
Input (English): 3, 21, ['E', '8623', '9395', '5057', 't', '2047', 'C', '9991', 't', '6291', '8351', '135', '1121', '9849', 'U', 'k', 'A', '9783', 'B', '9519', 'D', '8207', 'J', '2747', '9385', 'X', 't']
Output (English): 93955057t2047C9991t6291835113511219849UkA9783B9519D