Task: Program Execution
Input (English): 4667 7785 m 2013 1515 u 1425 2671 b f 9803 x 6249 6437 z 7133 b a o 5629 z 113 1551 6335 523 q u i 4865 v c q
Output (English): a, b, c, f, i, m, o, q, u, v, x, z