Task: Program Execution
Input (English): 8943, U, i, 4753, a, 5851, F, 1127, 3173, 7679, 7721, 8339, 4361, 409, l, Q, K, 6081, P, x, 7613, z, 5433, j
Output (English): 1, 4, 6, 8, 9, 10, 11, 12, 13, 14, 18, 21, 23