Task: Program Execution
Input (English): 12, 15, ['8415', '3175', '2153', '3863', '9999', '1289', '6873', 'o', 'L', '1701', 'y', 't', '1231', 'I', 'u', '4621', '3343', 'O', 'K', 'c', '9247']
Output (English): 1231