Write a Python script that prints the name and sequence with the 
larger number of A's. The input contains two sequences in FASTA format in 
a file called "dna.txt".

For example if the file contains 

>human
ACCGT
>mouse
GTGATAAA

then the output of the program should be 

>mouse
GTGATAAA

Your program should work for any sequences and not just the ones in the 
example.

Submit a hardcopy in class on Sept 13th.