#include<iostream>
using namespace std;
long N,M;
main()
{
	cin>>N>>M;
	long low=N/2,high=(N+1)/2;
	if(M<N-1||low*high<M)cout<<"NO"<<endl;
	else
	{
		cout<<"YES"<<endl;
		for(int i=0;i<N;i++)cout<<i+1<<endl;
		for(int i=0;i<low;i++)
		{
			M--;
			cout<<i+1<<" "<<low+i+1<<endl;
			if(low+i+2<=N)
			{
				M--;
				cout<<i+1<<" "<<low+i+2<<endl;
			}
		}
		for(int i=0;i<low&&M>0;i++)
		{
			for(int j=low;j<N&&M>0;j++)
			{
				if(j!=low+i&&j!=low+i+1)
				{
					cout<<i+1<<" "<<j+1<<endl;
					M--;
				}
			}
		}
	}
}