import sys
import math

def getUni(s):
	st = ""
	for c in "123456789":
		if(s.find(c)!=-1):
			st += c
	return st

inputs = []
unique=[]
counter=0
line = True
while line:
	line = sys.stdin.readline()
	if line=="\n":
		break
	i = line.replace("\n","").replace(" ","")
	it = getUni(i)
	if counter==0:
		if len(unique)!=0:
			print(len(unique))
			unique = []
	else:
		if len(unique)==0:
			unique.append(it)
		isu = True
		for u in unique:
			if u==it:
				isu = False
				break
		if isu:
			unique.append(it)
	counter-=1
print(len(unique))