Task: Program Execution
Input (English): W, E, 1715, 1503, M, 7673, 6801, K, 9803, 1345, 5393, K, I, u, w, B, n, 7617, k, 2959, 6881
Output (English): 3, 4, 6, 7, 9, 10, 11, 18, 20, 21