Task: Program Execution
Input (English): 11, 20, ['Y', 'r', 'U', '4453', 'W', 'b', '2363', '2303', '1767', 'A', '2119', '6421', 'e', 'B', 'Y', '2169', '7155', 'i', 'Q', '4049']
Output (English): 21196421eBY21697155iQ4049