Task: Program Execution
Input (English): X, O, 753, 7235, L, D, C, F, 4907, 539, 2241, e, p, 6183, 8301, S, 9415, 4615, e
Output (English): 753, 7235, 4907, 539, 2241, 6183, 8301, 9415, 4615