Task: Program Execution
Input (English): W, 7775, 7587, 2829, 8757, 9903, G, g, 9373, B, Q, 4983, n, c, X, U, 6381, C, X
Output (English): W, G, g, B, Q, n, c, X, U, C, X, 7775, 7587, 2829, 8757, 9903, 9373, 4983, 6381