1. Write a program in Python that reads a string and returns a table of the letters of the alphabet in alphabetical order which occur in the string together with the number of times each letter occurs. Case should be ignored. A sample output of the program when the user enters the data ThiS is String with Upper and lower case Letters, would look this this:

a 2

c 1

d 1

e 5

g 1

h 2

i 4

l 2

n 2

o 1

p 2

r 4

s 5

t 5

u 1

w 2