Task: Program Execution
Input (English): 4543, x, Z, N, 9121, j, R, 7765, L, E, 381, v, 3147, 7649, 1141, m, B, 9625, 4203, f, c
Output (English): 4543, 9121, 7765, 381, 3147, 7649, 1141, 9625, 4203