Task: Program Execution
Input (English): 1971, 2109, v, 1205, 3537, 5329, 3903, O, 1349, 611, e, Z, R, v, 1155, V, 3939, 7979
Output (English): 1, 2, 4, 5, 6, 7, 9, 10, 15, 17, 18