#include "bits/stdc++.h"

#define ALL(g) (g).begin(),(g).end()
#define REP(i, x, n) for(int i = x; i < n; i++)
#define rep(i,n) REP(i,0,n)
#define RREP(i, x, n) for(int i = x; i >= n; i--)
#define rrep(i, n) RREP(i,n,0)
#define pb push_back
#define show_table(n, k, table) rep(i,n){ rep(j,k) cout << table[i][j] << " "; cout << endl;}

template<class T> void chmax(T& a,const T& b){a=max(a,b);}
template<class T> void chmin(T& a,const T& b){a=min(a,b);}

using namespace std;

using ll = long long;
using P = pair<int,int>;
using Pl = pair<ll,ll>;
using vi = vector<int>;
using vvi = vector<vi>;

const int mod=1e9+7,INF=1<<30;
const double EPS=1e-12,PI=3.1415926535897932384626;
const ll lmod = 1e9+7,LINF=1LL<<60;
const int MAX_N = 302;

int main(){
  int N,M; cin >> N >> M;
  int X,Y; X = (N+1)/2; Y = (N)/2;
  if(!(M>=N-1 && M<=X*Y)){
    cout << "NO" << endl;
    return 0;
  }
  int rest = M - (N-1);
  int temp = X+1;
  rep(i,N){
    if(i%2==1) cout << temp++ <<  " ";
    else cout << i/2+1 << " ";
  }
  cout << "" << endl;
  rep(i,N){
    if(i!=N-1) cout << i+1 << " " << i+2 << endl;
    if(i!=N-1 && rest>0){
      if(i%2==1){
        for(int j=i+3;j<N;j+=2){
          if(rest==0) break;
          if(j==i+1) continue;
          cout << i+1 << " " << j+1 << endl;
          rest--;
        }
      }else{
        for(int j=i+3;j<N;j+=2){
          if(rest==0) break;
          if(j==i+1) continue;
          cout << i+1 << " " << j+1 << endl;
          rest--;
        }

      }
    }
  }
  return 0;
}