Regex tester
Pattern
Input
12 34 56 
Options
Replacement
Click the context tab to see replacements.
1 match found in about 0 milliseconds.
IndexPositionMatched String$1
0012 34 56 6
6 captures
  1. 1
  2. 2
  3. 3
  4. 4
  5. 5
  6. 6
12 34 56 
  1. empty string
  2. 6
  3. empty string