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Reg
ular
Ex
pressions
101
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Regular Expression
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270?(\d{9})
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g
Input 1
1
New
0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 27123456789 270123456789
Substitution
0\1
0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 0123456789 27123456789 270123456789