Task: Program Execution
Input (English): Z, 3597, 6769, 7487, A, 405, 563, 9755, 4423, 3567, 599, O, e, W, O, 6393, 8861, 2593, R, p, Z
Output (English): 2, 3, 4, 6, 7, 8, 9, 10, 11, 16, 17, 18