F x w

F x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x wF x w