Class	Food	Before treatment	After treatment
1	Whole apple	×	×
	Chewing gum	×	×
	Dried shell ligament	×	×
	Dried cuttlefish	×	×
2	Fresh ear shell	×	×
	Hard pickled radish	×	△
	Hard cracker	△	△
	Hard biscuit	△	△
3	Pickled radish	△	△
	Peanuts	△	△
	Beef steak	△	○
	Rice-cake cubes	△	○
4	Burdock	△	△
	Potato chips	△	○
	Boiled fish paste (kamaboko)	△	○
	Artificially grown soybean	○	○
5	Boiled carrot	△	○
	Boiled potato	△	○
	Boiled eggplant	△	○
	Bean curd (Tofu)	○	○