Task: Program Execution
Input (English): 4, 9, ['l', '6687', '687', '7967', '6881', '9315', 'x', 'K', '1273', 'C', '5963', 'b', 'a', '5177', 'B', '3317', 'F', 'q']
Output (English): 796768819315xK1273