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g
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$
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i
Reg
ular
Ex
pressions
101
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Regular Expression
r"
\w{3}(?!$)
"
gm
Input 1
1
New
A00 A000 A001 A009 A01 S92113 S92113D
Substitution
\g<0>.
A00 A000 A001 A009 A01 S92113 S92113D