n, m = map(int, input().split())
isfriend = [[False] * n for i in range(n)]
for i in range(m):
    a, b = map(int, input().split())
    isfriend[a-1][b-1] = True
    isfriend[b-1][a-1] = True
isgood = [[True] * n for i in range(n)]
for k in range(n):
    for i in range(n):
        for j in range(n):
            if i == j:
                continue
            if isfriend[i][j]:
                continue
            if isfriend[i][k] and isfriend[k][j]:
                isgood[i][j] = False
ans = 0
for i in range(n):
    for j in range(i+1, n):
        for k in range(j+1, n):
            if isgood[i][j] and isgood[j][k] and isgood[i][k]:
                ans += 1
print(ans)