A7QH4LBWGKUL4NTJSOM34VHDJPOYCX6EW45V4DAO3Q5KN3NORXIQC
T7T66GEUFLP3YHZN5UNOVBYK33KISJWJQKCPZU6MQH45KSU7CZZQC
YUQ4YINAT5YTK3CAY4VK3HSYQ4D63FXLLPMC4R3DUFHIZIUQO7WQC
node.h = box_height(node)