Classify the following as either red wines or white wines: Cabernet Sauvignon, Pinot Blanc, Riesling, Chardonnay, Pinot Grigio, Sauvignon Blanc, Merlot, Syrah, Shiraz

Red wines: Cabernet Sauvignon, Merlot, Syrah, Shiraz
White wines: Pinot Blanc, Riesling, Chardonnay, Pinot Grigio, Sauvignon Blanc