Write a Python function that implements the following method
callee BLAST-score. 

def blast_score(query, target):

	count = 0;

	for i = 0 to length of query {

		1. Let kmer be the substring of length 3 starting from
		position i in query.
	
		2. Count number of ocurrences of kmer in the target
		sequence and add to the variable count

	}

	return count

Use simple query and target examples that were given in class. 
Submit hardcopies of your program in class on Feb 28th, 2014.