Task: Program Execution
Input (English): 423, 1715, a, a, 6693, T, 763, x, 119, z, Y, d, 3911, 9549, 8905, U, 6521, F, P, h, B
Output (English): 423, 1715, 6693, 763, 119, 3911, 9549, 8905, 6521