import urllib,sys
moby = urllib.urlopen("http://ivle.informatics.unimelb.edu.au/media/subjects/600151/exercise_data/moby.txt").read()
# Complete the definition of this function:
def frequency(char):
	count = 0
	for x in moby:
		if char in x:
			count = count + 1
		else:
			count = count
	print count
		
frequency(sys.argv[1])