N, M = map(int, input().split())
if N < 4:
    print(0)
    exit()
AB = set([tuple(map(int, input().split())) for _ in range(M)])
ans = 0
for i in range(N - 3):
    for j in range(i + 1, N - 2):
        for k in range(j + 1, N - 1):
            for l in range(k + 1, N):
                X = [0] * 4
                if (i, j) in AB:
                    X[0] += 1
                    X[1] += 1
                if (j, k) in AB:
                    X[1] += 1
                    X[2] += 1
                if (k, l) in AB:
                    X[2] += 1
                    X[3] += 1
                if (i, l) in AB:
                    X[0] += 1
                    X[3] += 1
                if (i, k) in AB:
                    X[0] += 1
                    X[2] += 1
                if (j, l) in AB:
                    X[1] += 1
                    X[3] += 1
                if X == [2, 2, 2, 2]:
                    ans += 1
print(ans)