slope lines by I., S.(rot45deg)

wd@(+./\.on*#{&(' '0}a.))"1(0-.~,A)I}0$~1+>./>I=:{(-"1<./)(1 2,:_1 2)+/ .*~(*,A)#(#:i.@*/)$A=:a.&i.;._2(1!:1)3

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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