Task: Program Execution
Input (English): 3, 7, ['7683', '2999', 'a', '7259', 'l', '7375', '2213', 'Z', '5857', 'P', 'C', '1287', '8721', 'k', 'k', 'K', '7529', 'F']
Output (English): 31225737l9527a