from itertools import *

N, M = map(int, input().split())
adj_mat = [[0]*N for _ in range(N)]

for _ in range(M):
    ai, bi = map(int, input().split())
    adj_mat[ai-1][bi-1] = 1
    adj_mat[bi-1][ai-1] = 1

ans = 0

for c in combinations(range(N), 4):
    for p in permutations(c):
        a, b, c, d = p[0], p[1], p[2], p[3]
        
        if adj_mat[a][b]==1 and adj_mat[b][c]==1 and adj_mat[c][d]==1 and adj_mat[d][a]==1 and adj_mat[a][c]==0 and adj_mat[b][d]==0:
            ans += 1
            break

print(ans)