In following, the word string refers to a sequence of letters.
If A is a prefix substring of B. Then B is a ________ of A.
ban is a prefix substring of banana so banana is a ________ of ban?
In lexicographical ordering, prefix substrings sort before their ________s.
The words extension and continuation appear to only denote the part that comes after the prefix substring (e.g. ana).
Any single word or multiple words will do.