:%s/\./ /g {qzyw:let@i=0 :wh @" :let@i=@i+@"%2 :let@"=@"/2 :endw cw\x12i\x1bwq187@z{qz"adw"bdw"cdw"ddws\x12=@a+@b+@c+@d \x1b+q47@zZZ
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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