import itertools

N, M = map(int, input().split())
G = [set() for _ in range(N)]
for _ in range(M):
    a, b = map(int, input().split())
    G[a].add(b)
    G[b].add(a)

ans = 0
for t in itertools.combinations(range(N), 4):
    st = set(t)
    if all(len(G[x] & st) == 2 for x in t):
        ans += 1
print(ans)