Task: Program Execution
Input (English): 4, 20, ['4109', 'A', '2761', 'L', 'V', 'C', 'y', 'X', '1135', '5679', 's', '1849', 't', 'Z', '5611', '9089', 'w', '271', 'G', 'U']
Output (English): UG172w98091165Zt9481s97655311XyCVL