I'm trying to pull a specific recurring item from emails using regex and python, 
the pattern is always:

```
OS - TYPE - VER - en - he_IL - 1.1.2 - U: username - hash

```

i was trying to do it with the following condition:

```
if re.search('U: \s*( - )', message_body)

```

hoping to get "username" out, unfortunately it didn't give out anything.

also, trying `if re.search('U: \w*())', message_body)` gave me response that was too broad and included the actual "U: " with the username.

i would love to get some pointers that does not include link to the manual.