import itertools
N,M = map(int,input().split())
L = []
for m in range(M):
	line = list(map(int,input().split()))
	L.append(line)
A = [i for i in range(N)]
C = list(itertools.combinations(A,4))
num = 0
for c in C:
	side =[0,0,0,0]
	for i,k in enumerate(c):
		count = 0
		for l in L:
			if k in l:
				p2 = list(set(l) - {k})[0]
				if p2 in c:
					count = count + 1
		side[i] = count
	if side.count(2) == 4:
		num = num + 1
print(num)