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Task/Semordnilap/8th/semordnilap.8th

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+[] var, results
+
+: processline \ m s --
+  clone nip
+  tuck s:rev
+  m:exists? if
+    results @ rot a:push drop
+  else
+    swap true m:!
+  then ;
+
+{} "unixdict.txt" app:asset >s
+' processline s:eachline
+
+results @ dup a:len . " pairs" . cr
+a:shuffle
+( a:shift dup .  " is the reverse of " . s:rev . cr ) 5 times bye