#include "bits/stdc++.h"
using namespace std;
#define int long long
//#define endl '\n'
int mod=1e9+7;
int mod2=998244353;
const int INF=1e9;

signed main(){
  int n,k;
  cin>>n>>k;
  vector<int> a;
  vector<int> b;
  for(int i=1;i<=n;i++){
    for(int j=0;(1<<j)<=n;j++){
      if(i&(1<<j)&&i!=(1<<j)){
        a.push_back(i);
        b.push_back(1<<j);
      }
    }
  }
  cout<<a.size()<<endl;
  for(int i=0;i<a.size();i++)cout<<a[i]<<" "<<b[i]<<endl;

  for(int g=0;g<k;g++){
    int ans=0;
    string s;
    bool f=false;
    for(int i=0;(1<<i)<=n;i++){
      cout<<(1<<i)<<endl;
      cin>>s;
      if(s=="Yes"){
        f=true;
        break;
      }else if(s=="Near"){
        ans=ans|(1<<i);
      }
    }
    if(!f){
      cout<<ans<<endl;
      cin>>s;
    }
  }
}

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