Searching for digits followed by a string.

[Zen_Panda]

Hello.

Given an input like "1234abd-alknfsdan-asjkldn-asd" I want to be able to see if there are 4 digits at the start followed by a specific substring. In this case we will use abd. As in the given example, I want to be able to see that the string starts with 4 digits, then is followed by "abd". In this case it passes.
So far I can only match if there are digits in the string at all, not worrying about where. How can I go about this?

import re

string = "1234ict-asdasd-asdasd"

print(bool(re.search(r'\d', string)))

Thanks :)

P.S.
Just to clarify, these are the requirements:

• 4 (no more, no less) digits at the start of the string.
  
• Followed by a given string, it can be anything I want
  

[scidam]

Using regular expression in such trivial problem is overkill.

def check_string(a, fbs='mystring'):
    return a[:4].isdigit() and a[4:].startswith(fbs)

check_string("1234mystringgoeshere") # True