.........7777777777.|...........11111.....00000... ......
.........777777777...|.........111111...0000000... .....
................7777....|........11.1111..000....0 00......
...............7777.....|............1111.000..... .000.....
..............7777......|............1111..000.... 000......
.............7777.......|............1111...000000 0.......
............7777........|............1111....00000 0........
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