(let('display`string-size(s(read-line)))(#0=dotimes(i`s)(#0#(j`s)'(~ #`",s "(if(= #1=(div`s 2)i)j(if(or(= i j)(= #1#j)(=(+ i j 1)`s))i`s))))'" "))
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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