Task: Program Execution
Input (English): 1, 12, ['e', 'H', 'U', '7847', '7415', 'h', 'b', 'Q', 'V', 't', 'x', 's', 'C', '7021', 'Y', 'I', '1819']
Output (English): eHU78477415hbQVtxs