bubble sort by ySas (no bin)

0 0 moveto/p{cvi dup 9 le{( )print}if( )print =only}def 0 1 .runstdin count 3 sub array astore/a exch def 2 sub -1 0{{a exch 2 getinterval aload/d exch def 2 copy gt{exch 1}{0}ifelse 1 rmoveto d astore 0 / currentpoint(compare =)print p(   swap =)print p(   data:)print a{p}forall =}for 1}for

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