The fourth bird questions

The fourth bird answers

• Set together letters and numbers that are ordinal numbers
• Regex version number with negative lookahead
• regex question - Find a password like word in a sentence
• regex to match a column separated string unlesss it starts with a hyphen
• php subtract seconds from 20 minutes
• How to extract with a regex the 3 numerical values of coordinates of this string, whether they are positive or negative numerical coordinates
• Python Regex, optional word in brackets?
• Regex for ??? (three adjacent question marks) codetag for use in PyCharm
• Regex matching some and not matchin other combinations of characters
• Regex: Decimal with constraints and certain alpha characters allowed at the end