\ba Unicode word boundary
Group 1(\d{1,2}|1\d{2}|2[0-4]\d|25[0-5]) \d{1,2}a Unicode decimal digit, repeated between 1 and 2 times
1the literal 1 (4910 / 618 / 3116)
\d{2}a Unicode decimal digit, repeated exactly 2 times
2the literal 2 (5010 / 628 / 3216)
0-4one character from 0 (4810) to 4 (5210)
\da Unicode decimal digit
0-5one character from 0 (4810) to 5 (5310)
\ba Unicode word boundary
\.the literal . (4610 / 568 / 2E16)
\ba Unicode word boundary
Group 2(\d{1,2}|1\d{2}|2[0-4]\d|25[0-5]) \d{1,2}a Unicode decimal digit, repeated between 1 and 2 times
1the literal 1 (4910 / 618 / 3116)
\d{2}a Unicode decimal digit, repeated exactly 2 times
2the literal 2 (5010 / 628 / 3216)
0-4one character from 0 (4810) to 4 (5210)
\da Unicode decimal digit
0-5one character from 0 (4810) to 5 (5310)
\ba Unicode word boundary
\.the literal . (4610 / 568 / 2E16)
\ba Unicode word boundary
Group 3(\d{1,2}|1\d{2}|2[0-4]\d|25[0-5]) \d{1,2}a Unicode decimal digit, repeated between 1 and 2 times
1the literal 1 (4910 / 618 / 3116)
\d{2}a Unicode decimal digit, repeated exactly 2 times
2the literal 2 (5010 / 628 / 3216)
0-4one character from 0 (4810) to 4 (5210)
\da Unicode decimal digit
0-5one character from 0 (4810) to 5 (5310)
\ba Unicode word boundary
\.the literal . (4610 / 568 / 2E16)
\ba Unicode word boundary
Group 4(\d{1,2}|1\d{2}|2[0-4]\d|25[0-5]) \d{1,2}a Unicode decimal digit, repeated between 1 and 2 times
1the literal 1 (4910 / 618 / 3116)
\d{2}a Unicode decimal digit, repeated exactly 2 times
2the literal 2 (5010 / 628 / 3216)
\da Unicode decimal digit
\ba Unicode word boundary
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string