Describe in English the languages accepted by the following

Describe, in English, the languages accepted by the following DFAs:

Solution

1.) Set of string over a,b which will end with either aa or bb.

For example: aa, aaa, aaaa, bb, bbb, bbbb, abaa, ababaa, babb, bababb, etc..

2.) Set of strings over a,b which will end with aa.

For example: aa, aaa, aaaa, baa, bbaa, bbbaa, babababababababaa, etc..