Write a Python script to

1. compute the score of all pairwise alignments given
in alignments2.fasta and
2. print the alignments with the highest, second highest, and third
highest score. 

For step 2 print the names as well as the sequences of the three 
highest scoring alignments. Use the a gap open score of -20 and BLOSUM62 
scoring matrix in your alignment scoring program. 

The assignment is due Dec 17th. Submit your .py file to the TA via
email at yc354@njit.edu. Make sure your file is named 
<firstname>.<lastname>.bnfo135.py. So for example if your name is
Barack Obama then your filename should be barack.obama.bnfo135.py. 

Best of luck!