Task: Program Execution
Input (English): 5559, y, 4381, E, 7945, 3957, Q, 9149, 151, 6127, 7349, P, 3419, 6589, 9767, k, s, u, m, 3599, 1639, 211
Output (English): 1, 3, 5, 6, 8, 9, 10, 11, 13, 14, 15, 20, 21, 22