B"The Little Elephant is playing with the Cartesian coordinates' system. Most of all he likes playing with integer points. The Little Elephant defines an integer point as a pair of integers (x; y), such that 0 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89x xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89w and 0 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89y xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89h. Thus, the Little Elephant knows only (w xe2 x80 x89+ xe2 x80 x891) xc2 xb7(h xe2 x80 x89+ xe2 x80 x891) distinct integer points. The Little Elephant wants to paint a triangle with vertexes at integer points, the triangle's area must be a positive integer. For that, he needs to find the number of groups of three points that form such triangle. At that, the order of points in a group matters, that is, the group of three points (0;0), (0;2), (2;2) isn't equal to the group (0;2), (0;0), (2;2). Help the Little Elephant to find the number of groups of three integer points that form a nondegenerate triangle with integer area. A single line contains two integers w and h (1 xe2 x80 x89 xe2 x89 xa4 xe2 x80 x89w, xe2 x80 x89h xe2 x80 x89 xe2 x89 xa4 xe2 x80 x894000). In a single output line print an integer -- the remainder of dividing the answer to the problem by 1000000007 (109 xe2 x80 x89+ xe2 x80 x897)."...