Why does Python hates my ":"?

Question

for example: the input should be
a
adgs
and then the output will be:
start
2

https://code.sololearn.com/c1i2Ufqd7xZc/?ref=app

Answer 1

You have to add yet another closing bracket ) in line 8.
Also, you'll encounter an error in line 4, as you try to assign r to the pattern variable. And r is not defined elsewhere. Simply write:
pattern = x
-- that will work.