Task: Program Execution
Input (English): 8725 A e a 4413 x 9807 r t 7177 1449 4999 h u l 8845 1767 7043 X k 7127 X N 7825 1985
Output (English): 2, 3, 4, 6, 8, 9, 13, 14, 15, 19, 20, 22, 23