Regex
Look ahead example
U+123
(?=U\+\d+)U\+(\d+).*)
Look for something starting with a 'U+' followed by a number then match on the same string and then process that sequence in this case capture the number
U+123
(?=U\+\d+)U\+(\d+).*)
Look for something starting with a 'U+' followed by a number then match on the same string and then process that sequence in this case capture the number