import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

import numpy as np
import itertools

N,M = map(int,readline().split())
m = map(int,read().split())
AB = zip(m,m)

G = np.zeros((N,N),np.bool)
for a,b in AB:
    G[a,b] = 1
    G[b,a] = 1

ABCD = np.array(list(itertools.combinations(range(N),4)))

if ABCD.shape[0] == 0:
    print(0)
    exit()

def deg(i):
    d = np.zeros(ABCD.shape[0],np.int32)
    for j in range(4):
        if i == j:
            continue
        d += G[ABCD[:,i], ABCD[:,j]]
    return d

is_ok = np.ones(ABCD.shape[0],np.bool)
for i in range(4):
    is_ok &= deg(i) == 2

answer = np.count_nonzero(is_ok)
print(answer)