Task: Program Execution
Input (English): 2, 25, ['2287', 'k', 'U', '749', '8271', 'U', '4077', '3205', '7797', '6887', 'z', 'h', 'w', 'D', '1271', 'n', 'k', 'B', '3887', 'D', '5743', 'B', '9199', '9609', 'Z', 'o']
Output (English): Z90699919B3475D7883Bkn1721Dwhz7886797750237704U1728947Uk