Task: Program Execution
Input (English): a, A, 6601, k, X, i, 7919, 4305, 6221, 4891, P, 2351, q, 4861, s, 7211, 4917, 9847, 5563, 2401, a, 6429, 439, b
Output (English): 6601, 7919, 4305, 6221, 4891, 2351, 4861, 7211, 4917, 9847, 5563, 2401, 6429, 439