for loop to iterate through words

Question

My previous post caused a lot of confusion and it flooded with answers that is not relevant to my questions. (My fault for not clarifying things) I flagged that post and this is

Answer 1

I think your rule goes something like this: If the first string has a suffix that's also a prefix of the second string, chop it off. Then merge the two strings.

If you search backward, starting with the whole string and working down instead of starting with a single character and working up, you don't need to keep track of anything at all, other than the current suffix you're testing. In other words:

def frags(strings):
    left, right = strings
    for i in reversed(range(len(left))):
        if right.startswith(left[-i:]):
            return left[:-i] + right
    return left+right