bbk----------------r-
kbkkkk------------gkk
kbbbbkkkkkkkk-----gkk
kkkkbkk-----k-----gkk
kbbbbkkkkkk-kkkk--gkk
kbkkkkkkkkk-kkkk--gkk
kbbbbbbbbbbbbbbbbbgkk
kkkkkkkkkkkkkkkkkkkkk
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