Task: Program Execution
Input (English): p, 1247, 3753, u, 5931, 3365, 8017, f, 7713, 251, 9099, 7939, 6437, 8679, x, 9819
Output (English): 2, 3, 5, 6, 7, 9, 10, 11, 12, 13, 14, 16