ref: bedac6438461449392694dd8c4a7028ccdc46019
dir: docs.9front.org/quine.md
# Plan 9's Quines
Quine in rc.
a=`{echo ' a=`{echo '' Q '' }; q= W ; for(i in $a){if(~ $i Q){for(i in $a){if(~ $i $q) echo -n $q; echo -n $i E }};if not{if(~ $i W) echo -n $q$q$q$q E ; if not{if(~ $i E) echo -n $q$q E ; if not echo -n $i E }}};echo ' }; q= '''' ; for(i in $a){if(~ $i Q){for(i in $a){if(~ $i $q) echo -n $q; echo -n $i '' }};if not{if(~ $i W) echo -n $q$q$q$q '' ; if not{if(~ $i E) echo -n $q$q '' ; if not echo -n $i '' }}};echo
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[Quine on Wikipedia](https://en.wikipedia.org/wiki/Quine_(computing))