import itertools
	
a = [int(input()) for _ in range(6)]

st = set()
for k in itertools.product(range(10), repeat=6):
	s = 0
	for i in range(6):
		t = 0
		for j in range(6):
			t += (a[i] // 10 ** j * k[j] + s // 10 ** j) % 10 * 10 ** j
		s = t
		
	st.add(s)
    
print(len(st))