There is a couple and they have many children. 7 of them dont eat spinach. 5 ot them dont eat carrot. 6 of them dont eat beans. 4 of them dont eat either spinach or carrot. 2 of them eat neither spinach or beans and 3 of them eat neither carrot or beans. and 1 dont eat spinach, carrot or beans. How many children r there in total?