Task: Program Execution
Input (English): 6757, 9701, 6053, g, 6127, 2791, j, z, m, 1139, 4269, 4769, W, 987, s, 4203, 7393, x, 7683, 9851, 4613, 7459
Output (English): 4, 7, 8, 9, 13, 15, 18