Write a Python program that prints the column numbers in a FASTA format multiple
alignment that are 100% conserved. A 100% conserved column is one that has the exact
same nucleotide in every sequence. For example in the multiple alignment below

>human
ACC
>mouse
ACC
>cat
TCC
>dog
ACA

column 2 is 100% conserved but columns 1 and 3 are not 100% conserved.

You may assume that all sequences are of length 3 in the multiple alignment but 
the number of sequences can vary.

Submit your solution in class on Nov 16th.