Regex capture group nesting -


i've started learning regex , i've been stuck on this lesson while now.

enter image description here

i don't quite understand why below 2 won't work.

^(.+(\d+))$  ^([a-za-z_]+(\d+))$

both work ok, need space before nested group.

your regex work if text example: jan1987. examples in link posted like: jan 1987

try:

^(.+ (\d+))$  ^([a-za-z_]+ (\d+))$

-

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