PREPARED FOODS OBTAINED BY THE SWELLING OR ROASTING OF CEREALS OR CEREAL PRODUCTS (FOR EXAMPLE, CORN FLAKES); CEREALS [OTHER THAN MAIZE (CORN) ] IN GRAIN FORM OR IN THE FORM OF FLAKES OR OTHER WORKED GRAINS (EXCEPT FLOUR, GROATS AND MEAL), PRE - COOKED OR OTHERWISE PREPARED, NOT ELSEWHERE SPECIFIED OR INCLUDED PREPARED FOODS OBTAINED FROM UNROASTED CEREAL FLAKES OR FROM MIXTURES OF UNROASTED CEREAL FLAKES AND ROASTED CEREAL FLAKES OR SWELLED CEREALS