I'm very new to Perl programming and am having trouble creating a regular expression for pattern matching. I want to pattern match a specific text string followed by a certain number of any combination of letters and digits.

For example, in some text, I want to search for the text "Bob: " and then let's say the next 20 characters, which can be any combination of alphas and numerics. How would I construct that regex match?

Thanks in advance for your help!