| values,patterns,replacement,flags | |
| abc,^(a),bb\1bb,i | |
| ABC,^(A).*,B,i | |
| aBc,(b|d),e,i | |
| AbC,(B|D),e, | |
| aBC,^(b|c),d, | |
| 4000,\b4([1-9]\d\d|\d[1-9]\d|\d\d[1-9])\b,xyz, | |
| 4010,\b4([1-9]\d\d|\d[1-9]\d|\d\d[1-9])\b,xyz, | |
| Düsseldorf,[\p{Letter}-]+,München, | |
| Москва,[\p{L}-]+,Moscow, | |
| Köln,[a-zA-Z]ö[a-zA-Z]{2},Koln, | |
| اليوم,^\p{Arabic}+$,Today, |