Task: Program Execution
Input (English): 15, 18, ['3107', 'm', 'b', 'm', 'O', '215', 'b', '1749', '7373', 'x', '5713', 'U', '2443', '5521', '6679', '2373', 'u', '8531', 'c', 'h', 'd', 'm', 'I', 'f', 'C', 'E', '4247']
Output (English): 66792373u8531