in a bowl, mix together the warm water, sugar, and yeast. Let foam for 5 minutes.In a bigger bowl, mix together the all purpose flour, the whole wheat flour, salt, the yeast mixture, and the milk.Knead this mixture well, and form it into a dough.In an oiled bowl, roll the dough into it and cover the bowl. Let the dough rise for about an hour.After the wait, divide the dough from the bowl into 16 pieces and place on a baking tray.Coper the tray with a damp cloth and let it rise for another hour.Then bake these rolls at 350 degreed F. for 22-25 minutes.Serve the rolls with melted butter brushed on top and sprinkled with sea salt.