Task: Program Execution
Input (English): 9589, 6433, d, 4233, v, 8693, 4291, A, 5313, A, 4529, 7761, 5101, 2337, E, R, 8955, e, g, 1637, 6647
Output (English): 1, 2, 4, 6, 7, 9, 11, 12, 13, 14, 17, 20, 21