Task: Program Execution
Input (English): Z, 503, F, 6449, S, 4755, l, a, 4811, B, T, 593, B, 6767, 1717, 1601, 5215, 1067, e, 2075, 5851
Output (English): 503, 6449, 4755, 4811, 593, 6767, 1717, 1601, 5215, 1067, 2075, 5851