Task: Program Execution
Input (English): 2689, z, 2929, 3621, f, x, c, c, 6073, l, k, 4091, 8219, x, z, 5577, 5879, 3415, p, 6465, w, h, 7455
Output (English): c, f, h, k, l, p, w, x, z