Alphabet Soup

Each letter in these KenKen grids corresponds to a unique number between 1 and 12. Can you figure out which numbers go to each letter?

(A brief explanation of KenKen: in each of these grids, every row and every column contains the numbers 1 through 4 in some order. The label in a box indicates the result of performing the operation on all the numbers in that box; for instance, a box labeled '3−' means that the difference of the two numbers in the box is 3; a box labeled '16×' means that the product of all the numbers in the box is 16.)

3 5 6 1 11 9 10 4 7 5 5 8 9 2 10 12