Heat map (vertical): ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZYWWXWVVVWVVWWVVVWWWVVVVUUUUUUUUUUUUUUUUUUUUUUUUUUVUUUUUUUUUTTTTTTTTTTTTTTTTTTTTSTTSSSSSSSTSSSSSSTTTTSSSSTTSSSTTTTTTSSTTTTTTTTTTTTTTTTTTUUTSSSSSSSTUUUUUUUUUUUUUUUUUUUVVVVVVVVVVVVVVVVVVWWXYYYYZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ