n,m = map(int,input().split())
g = [[0]*n for _ in range(n)]
for _ in range(m):
    a,b = map(int,input().split())
    g[a][b] = g[b][a] = 1
from itertools import permutations as p
ans = 0
for a,b,c,d in p(range(n),4):
    if g[a][b] == g[b][c] == g[c][d] == g[d][a] == 1 and g[a][c] == g[b][d] == 0:
        ans += 1
print(ans//8)