How to compare to strings in python 3

[vinnygod]

say the user inputs 2 strings
aaaabcddd
aaabbccdd

i need to figure out how to compare each charecter and the ones that dont match would be uppercased.

aaaAbcDdd
aaaBbcCdd

[bvdet]

vinnygod,

Have you tried to write code? We are not here to write code for you, but will be glad to help you with your code.