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#!perl
$_=++$/x11 .<>;map{$i=$-[0];{map{1while
s/w((?<=W.{10})|(?<=W.)|(?=.{9}W|W))/W/s;/W((?<= .{10})|(?<= .)|(?=.{9
+} | ))/s||$i=~/./+print("$& $'\n")+last}"$`W$'"while/w/g}}"$`x$'"whil
+e/ /g

#!perl
$_= ++$ / x11 . <>;
...
    } "$`W$'" while/w/g
  }
} "$`x$'" while/ /g

#!perl -ln0
map{$i=$-[0]+11;{map{1while
s/w((?<=W.{10})|(?<=W.)|(?=.{9}W|W))/W/s;/W((?<= .{10})|(?<= .)|(?=.{9
+} | ))/s||$i=~/./+print("$& $'")+last}"$`W$'"while/w/g}}"$`x$'"while/
+ /g

#!perl -ln0
map {
...
    } "$`W$'" while/w/g
  }
} "$`x$'" while/ /g