Task: Program Execution
Input (English): o, 6685, 2179, 3523, s, 4263, r, u, 5415, t, 1353, g, B, P, m, 4113, 1945, T, 1431, X, 2549
Output (English): 1, 5, 7, 8, 10, 12, 13, 14, 15, 18, 20