How do you select lower and uppercase characters in a string using an if-else statement in Python?

I'm trying to solve a problem where I wish to select multiple words beginning with 's', but have both the lowercase and uppercase words be shown in the output.

To try and achieve my desired result, I used an if-else statement in a for-loop but it only selected the first value I chose. For example, if I wrote 'S' first, it selected the uppercase and ignored the lowercase.

st = 'Sally sells shakes from Shake Shack every Saturday.'

for i in st.split():
 if i[0] == 's' and 'S':
        print(i)

I expected the output to be: sells shakes Sally Shake Shack Saturday

But the actual output was: sells shakes