Fill a large and deep pot with 14 cups water.
Wash bulgur and rice very well, add them into the post and boil until mushy.
Strain them using a fine strainer and pressing with a spatula. Throw the dregs away.
Let it sit uncovered away from the sun for about 2 hours.
Mix 1 tablespoon sugar and yeast with 1 cup water and add into the pot. Cover it with the lid.
Let it sit in a cool place for about 20 hours stirring every once in a while.
Add the rest of the sugar after 20 hours and stir well.
Keep it in refrigerator.