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Heat oven to 350°F. Grease and flour two 10-oz. custard cups, two 8-inch round cake pans and one 9-inch round cake pan. In very large bowl, combine cake mixes, water, oil and eggs; beat at low speed until moistened. Beat 2 minutes at medium speed. Spoon 3/4 cup batter into each greased and floured custard cup. Divide remaining batter evenly into greased and floured cake pans. Place cake pans in oven first, then custard cups.