Task: Program Execution
Input (English): 4, 20, ['c', '3385', 'O', 'j', 'U', 'k', '8521', 'N', 'i', '5523', 'C', '3851', 'D', 'P', '8471', 'J', 'O', '3621', '4173', 'p', '2523', '639', '8005']
Output (English): jUk8521Ni5523C3851DP8471JO36214173p