Task: Program Execution
Input (English): 2, 20, ['W', '2913', '9207', '4159', '5743', '2519', 'a', '5477', '5787', '8363', 'B', '1177', 'z', '2415', 'e', 'u', 'B', '9567', '3251', '8537']
Output (English): 69115