from itertools import *

N, M = map(int, input().split())
S = set()
for i in range(M):
    a, b = map(int, input().split())
    S.add( (a, b) )
    
ans = 0
for a, b, c, d in combinations(range(N), 4):
    cnt = 0
    for tup in combinations([a, b, c, d], 2):
         if tup in S:
             cnt += 1
    if cnt != 4:
        continue
    
    cnt = 0
    for tup in combinations([a, b, c], 2):
         if tup in S:
             cnt += 1
    if cnt != 2:
        continue
    
    cnt = 0
    for tup in combinations([a, b, d], 2):
         if tup in S:
             cnt += 1
    if cnt != 2:
        continue
    
    cnt = 0
    for tup in combinations([a, c, d], 2):
         if tup in S:
             cnt += 1
    if cnt != 2:
        continue
    
    cnt = 0
    for tup in combinations([b, c, d], 2):
         if tup in S:
             cnt += 1
    if cnt != 2:
        continue
    ans += 1
print(ans)