Task: Program Execution
Input (English): 659, S, i, 3353, C, w, N, 6579, e, T, W, F, 6531, L, 9535, 547, U, 4183, 1999, l, l
Output (English): 659, 3353, 6579, 6531, 9535, 547, 4183, 1999