Divide the rectangle by %20

s/^/              ab\
  acd\
   efcd\
eghd\
        egi\n/
:
s/ \(\S*\n\)/\1\1/
t
s/a/aaaaaa/g
s/b/bbbbb/g
s/c/ccccccc/g
s/d/dddddddd/g
s/e/eeeeeeeeeeeeee/g
s/f/ffff/g
s/g/gggggggggg/g
s/i/iii/g
s/[abi]/&&&/g
s/\w/ &/g

Note that non-ascii characters in the above source code will be escaped (such as \x9f).

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