Task: Program Execution
Input (English): 7803, 7609, G, n, 9123, 6751, 561, X, K, q, Y, 925, 1747, N, W, 533, 2375, J, l, 3219, p, 6271
Output (English): 1, 2, 5, 6, 7, 12, 13, 16, 17, 20, 22