Task: Program Execution
Input (English): 4, 20, ['6855', 'g', 'k', 'b', 'C', 'R', '1817', 'Q', 'F', '3813', 'M', 'S', 'd', 'i', 'A', '1123', '9071', '9283', 'k', 'U']
Output (English): bCR1817QF3813MSdiA112390719283kU