Bijective base 10 add by %20

:
s/[2-A]/&-/g
y/23456789A/123456789/
t
s/\(1-*\)\( \S*\)1/\2\x09\1-/
t
:0
s/-/<<123456789A-1>/
s/\s*\(.\)<.*\1\(-*.\).*>/\2/
t0

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

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