import itertools

n, m = map(int, input().split())
graph = [[0] * n for i in range(n)]

for i in range(m):
    a, b = map(int, input().split())
    graph[a][b] = 1
    graph[b][a] = 1

c = list(itertools.combinations(range(n), 4))
ans = 0
for i,j,k,l in c:
    cnt = 0
    x = list(itertools.permutations([i,j,k,l]))

    for loop in range(len(x)):
        x1 = x[loop][0]
        x2 = x[loop][1]
        x3 = x[loop][2]
        x4 = x[loop][3]

        if graph[x1][x2] == graph[x2][x3] == graph[x3][x4] == graph[x4][x1] == 1 and graph[x1][x3] == graph[x2][x4] == 0:
            ans += 1
            break

print(ans)