n,m=map(int,input().split())
g=[[n*2]*n for _ in range(n)]
for _ in range(m):
    a=list(map(int,input().split()))
    g[a[0]-1][a[1]-1]=1
    g[a[1]-1][a[0]-1]=1
for k in range(n):
    for i in range(n):
        for j in range(n):
            g[i][j]=min(g[i][j],g[i][k]+g[k][j])
ans=set()
for i in range(n):
    for j in range(i+1,n):
        if g[i][j]!=2:
            for k in range(j+1,n):
                if g[j][k]!=2 and g[k][i]!=2 and k!=i:
                    a=sorted([i+1,j+1,k+1])
                    ans.add(a[0]*100+a[1]*10+a[2])
ans=list(ans)
print(len(ans))