Pumpernickel Bread

Ingredients

• 2 pkg. active dry yeast
• 3/4 cup water
• 1 tsp. sugar
• 1 3/4 cup water
• 1 1/2 Tbsp. salt
• 1/4 cup dark molasses
• 1 cup mashed potatoes,unseasoned
• 7 cups rye flour
• 1/2 cup cornmeal
• 2 cups whole wheat flour, about