from itertools import combinations

n, m = tuple(int(x) for x in input().split())

ab_lst = []
for _ in range(m):
    a, b = tuple(int(x) for x in input().split())
    ab_lst.append((a, b))

cnt = 0

for n1, n2, n3, n4 in combinations(range(n), 4):
    #print('### {} {} {} {}'.format(n1, n2, n3, n4))

    n_set = {n1, n2, n3, n4}

    lst = [(a, b) for a, b in ab_lst if a in n_set and b in n_set]
    #print(lst)

    if (len(lst) == 4):
        if (n1, n2) in lst and (n2, n3) in lst and (n3, n4) in lst and (n1, n4) in lst:
            #print("*" + str(list(lst)))
            cnt += 1
        elif (n1, n2) in lst and (n1, n3) in lst and (n2, n4) in lst and (n3, n4) in lst:
            #print("*" + str(list(lst)))
            cnt += 1

print(cnt)