n,m=map(int,input().split())
d=[[3]*n for _ in range(n)]
for i in range(m):
    a,b=map(int,input().split())
    a-=1
    b-=1
    d[a][b]=1
    d[b][a]=1
for m in range(n):
    for i in range(n):
        for j in range(n):
            d[i][j]=min(d[i][j],d[i][m]+d[m][j])
ans=0
for i in range(n):
    for j in range(i+1,n):
        for k in range(j+1,n):
            if d[i][j] !=2 and d[j][k] !=2 and d[i][k] !=2:
                ans+=1
print(ans)