Write a Python program that prints the score of a sequence alignment
given in FASTA format. Use match=10, mismatch=2, and gap=-5.

For example if the input in the file dna.fasta is

>A
ACCGTAATT
>B
ACC--GCAT

then the program should output 

40 + 6 - 10 = 36

Submit a hardcopy in class on Oct 24th.