-------k-----------
--k----y---------k-
--g----y--k------y-
--g-k--y--g--k-k-y-
--g-p--y--g--b-p-y-
kkkkpkkkkkkkkbkpkkk
kkkkpkkkkkkkkbkpkkk
kkkkpkkkkkkkkbkkkkk
kkkkkkkkkkkkkbkkkkk
kkkkkkkkkkkkkkkkkkk
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