Task: Program Execution
Input (English): 4, 13, ['6729', 'u', '8437', '3573', '5367', '2101', '3105', 'u', '5087', '5871', '9969', 'b', 'd', '3349', 'n', 'D', 'Z', 'r', 'm', '899', '2355', 'H', '7891']
Output (English): 3573536721013105u508758719969bd