#include <iostream>

using namespace std;

int a[101][101]={0},n,m,b[101]={0},c[101]={101},i,j,l,s=0;

int main()
{
cin>>n>>m;
for(l=1;l<=m;l++)
{
    cin>>i>>j;
          a[i][j]=1;
}
for(i=1;i<=n;i++)
    for(j=1;j<=n;j++)
    {
       if(a[i][j]==1)
          b[i]++;
      if(a[j][i]==1)
    c[i]++;
    }
    for(i=1;i<=n;i++)
        if(b[i]+c[i]!=n-1)
        s=1;
    if(s==1)
    cout<<"Nu este turneu";
    else
        cout<<"Este turneu";
    return 0;
}