#yuki_488

n,m=map(int,raw_input().split())
ls=[[0 for i in xrange(51)] for j in xrange(51)]
for i in xrange(m):
 a,b=map(int,raw_input().split())
 ls[a][b]=ls[b][a]=1
res=0
for i in xrange(n):
 for j in xrange(i+1,n):
  for k in xrange(j+1,n):
   for l in xrange(k+1,n):
    x1=ls[i][j]+ls[i][k]+ls[i][l]
    x2=ls[j][k]+ls[j][l]+ls[j][i]
    x3=ls[k][l]+ls[k][i]+ls[k][j]
    x4=ls[l][i]+ls[l][j]+ls[l][k]
    if x1==2 and x2==2 and x3==2 and x4==2:
     res+=1
print res