Task: Program Execution
Input (English): 6, 21, ['F', '2689', 'u', 's', '6993', '6635', '2395', '1655', '8343', 'q', 'f', 'k', '6503', 't', 's', 'z', 'a', '4767', 'q', '139', 'E', 'e', '3109', '4273', '5099']
Output (English): 6635239516558343qfk6503tsza4767q139E