Task: Program Execution
Input (English): p, 8713, O, Y, H, 7003, 2625, O, 3541, 3953, 4809, A, j, 1847, m, 2851, 5335, m, F, J, 2933, 6557, 4369
Output (English): 1, 3, 4, 5, 8, 12, 13, 15, 18, 19, 20