Task: Program Execution
Input (English): U, 2029, 6641, p, U, 7891, i, 5457, 697, 9401, w, 4383, 1455, 1401, L, 6349, 5537, 8267
Output (English): 2, 3, 6, 8, 9, 10, 12, 13, 14, 16, 17, 18