Heat map (vertical): AAAAABCCDDDDDDDEDEDBAAAAAEEEEEEEMMMMMMNNNNNNOOOOOOOOOOOOOOOOOOONGGGGHHHHHHHIIIIIIIIIIIIIJJJJJJJGGGGJJJJJKLLKJJJJJJJJJJJJJJJJJKKIIIIIJJJJJJJJJJJJJJKJIIIIIJGIHHHHHFFGGGGGGIIIIIIIIKKKKJJJJKKKKKKKKKKKKKKLMNMMMMMMMMMMMNNKKKKKKJJJJJJJJJJJJJJHHHHHIIHHHHHHIJKKJKLMLLLLLLLMMLLLLLLLLLLLLLLLLKKKKKKKJJJJIHHHHHHIHIILKKKKLGHHHHGGGGGHHHHJJJJIIKJIIJJJJJJJJJJJJJJJJJKKJJKKJJKJIIHIIIHHHIHHIIIJIMLLKKMHHHHHHHHHHHHHHHGGGGGGGGGGGFFFFEPPEFFEEEEFGGIIHHHHHHHHHHHHHHHHHGHHHHHHHHGGGFFFFFFEEEDCBBBBBBBBBBBB