Heat map (vertical): YZZZZZZZZZZZZZZZZZZZYYYYYYYYXWWWWWWWWWWWWWWWWVVVVVVVVVVVVVVUUUUUUUUUUUUUUUUUUUUUUUUUUTTTTTTTTTTTTTTTSSSSSSSSSSSSSSSSSRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRQQQRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRRSSSSSSSSSSSSSSTTTTTTTTTTTUUUUUUUUUUUUUVVVVVVWWWWWWWWWWXXXXXXXXXXXXXXXXXXXXXXXXWWWWWXXXYXYZZZZZZZZZZZZZZZZZ