Write a Python program that given a sentence determines if every letter in the alphabet is in the sentence. It does not matter if the letter is capital or small, so if either E or e is in the sentence then the letter is said to be included. For each string read, indicate whether all letters are included, or not. If not, then print out the missing letters.

Test Data that must be used:

The rain in Spain falls mainly in the plains.

The quick brown fox jumps over the lazy dog