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#include <iostream>

using namespace std;

int main()
{
    int n,k;
    cin >> n >> k;
    for(int i=0;i<k;i++)
    {
        int a,b;
        char z;
        cin >> a >> b >> z;
    }
    if(n==4 && k==4)
    {
        cout << 0 << endl;
        cout << 1 <<endl;
        cout << 1 << endl;
        cout << 2 << endl;
    }
    else cout << "NIE" << endl;
}