Task: Program Execution
Input (English): f, O, 5951, p, I, E, R, 8299, 6531, W, 6509, J, g, 1951, i, p, 8171, V, o
Output (English): 1, 2, 4, 5, 6, 7, 10, 12, 13, 15, 16, 18, 19