//#define _GLIBCXX_DEBUG

#include<bits/stdc++.h>
using namespace std;

//#define endl '\n'
#define lfs cout<<fixed<<setprecision(10)
#define ALL(a)  (a).begin(),(a).end()
#define ALLR(a)  (a).rbegin(),(a).rend()
#define spa << " " <<
#define fi first
#define se second
#define MP make_pair
#define MT make_tuple
#define PB push_back
#define EB emplace_back
#define rep(i,n,m) for(ll i = (n); i < (ll)(m); i++)
#define rrep(i,n,m) for(ll i = (ll)(m) - 1; i >= (ll)(n); i--)
using ll = long long;
using ld = long double;
const ll MOD1 = 1e9+7;
const ll MOD9 = 998244353;
const ll INF = 1e18;
using P = pair<ll, ll>;
template<typename T1, typename T2>bool chmin(T1 &a,T2 b){if(a>b){a=b;return true;}else return false;}
template<typename T1, typename T2>bool chmax(T1 &a,T2 b){if(a<b){a=b;return true;}else return false;}
ll median(ll a,ll b, ll c){return a+b+c-max({a,b,c})-min({a,b,c});}
void ans1(bool x){if(x) cout<<"Yes"<<endl;else cout<<"No"<<endl;}
void ans2(bool x){if(x) cout<<"YES"<<endl;else cout<<"NO"<<endl;}
void ans3(bool x){if(x) cout<<"Yay!"<<endl;else cout<<":("<<endl;}
template<typename T1,typename T2>void ans(bool x,T1 y,T2 z){if(x)cout<<y<<endl;else cout<<z<<endl;}  
template<typename T>void debug(vector<vector<T>>&v,ll h,ll w){for(ll i=0;i<h;i++){cout<<v[i][0];for(ll j=1;j<w;j++)cout spa v[i][j];cout<<endl;}};
void debug(vector<string>&v,ll h,ll w){for(ll i=0;i<h;i++){for(ll j=0;j<w;j++)cout<<v[i][j];cout<<endl;}};
template<typename T>void debug(vector<T>&v,ll n){if(n!=0)cout<<v[0];for(ll i=1;i<n;i++)cout spa v[i];cout<<endl;};
template<typename T>vector<vector<T>>vec(ll x, ll y, T w){vector<vector<T>>v(x,vector<T>(y,w));return v;}
ll gcd(ll x,ll y){ll r;while(y!=0&&(r=x%y)!=0){x=y;y=r;}return y==0?x:y;}
vector<ll>dx={1,-1,0,0,1,1,-1,-1};vector<ll>dy={0,0,1,-1,1,-1,1,-1};
template<typename T>vector<T> make_v(size_t a,T b){return vector<T>(a,b);}
template<typename... Ts>auto make_v(size_t a,Ts... ts){return vector<decltype(make_v(ts...))>(a,make_v(ts...));}
template<typename T1, typename T2>ostream &operator<<(ostream &os, const pair<T1, T2>&p){return os << p.first << " " << p.second;}
template<typename T>ostream &operator<<(ostream &os, const vector<T> &v){for(auto &z:v)os << z << " ";cout<<"|"; return os;}
//mt19937 mt(chrono::steady_clock::now().time_since_epoch().count());
struct SCC{
  ll n;
  vector<vector<ll>>&G,Gr;
  vector<ll>index;//各ノードが属する強連結成分の番号
  vector<ll>ret;//dfsに使う
  SCC(vector<vector<ll>>&g):G(g),n(g.size()){
    index.assign(n,-1LL);
    build();
  }
  void build(){
    Gr.assign(n,vector<ll>());
    for(ll i=0;i<n;i++){
      for(ll j=0;j<G[i].size();j++){
        Gr[G[i][j]].push_back(i);
      }
    }
    for(ll i=0;i<n;i++)if(index[i]==-1)dfs1(i);
    fill(ALL(index),-1);
    ll cnt=0;
    reverse(ALL(ret));
    for(ll i=0;i<n;i++){
      if(index[ret[i]]==-1){
        dfs2(ret[i],cnt);
        cnt++;
      }
    }
  }
  void dfs1(ll k){
    index[k]=1;
    for(ll i=0;i<G[k].size();i++){
      if(index[G[k][i]]==-1)dfs1(G[k][i]);
    }
    ret.push_back(k);
  }
  void dfs2(ll k, ll idx){
    index[k]=idx;
    for(ll i=0;i<Gr[k].size();i++){
      if(index[Gr[k][i]]==-1)dfs2(Gr[k][i],idx);
    }
  }
  vector<vector<ll>>edges;
  void build_edges(){
    edges.assign(*max_element(ALL(index))+1,vector<ll>());
    for(ll i=0;i<n;i++){
      for(ll j=0;j<G[i].size();j++){
        if(index[i]!=index[G[i][j]]){
          edges[index[i]].push_back(index[G[i][j]]);
        }
      }
    }
  }
  vector<ll>output(){return index;};
};

struct TwoSat{
  ll n;
  vector<vector<ll>>g;
  TwoSat(ll N):n(N){
    g.assign(2*n,vector<ll>());
  }
  void add_or(ll x,bool tx,ll y,bool ty){//x+n:true x:false
    g[x+!tx*n].push_back(y+ty*n);
    g[y+!ty*n].push_back(x+tx*n);
  }
  vector<bool>ans;
  bool solve(bool isConstruct = false){
    SCC scc(g);
    for(ll i=0;i<n;i++)if(scc.index[i]==scc.index[i+n])return false;
    if(isConstruct){
      ans.assign(n,false);
      for(ll i=0;i<n;i++)ans[i]=(scc.index[i] < scc.index[i+n]);
    }
    return true;
  }
};
int main(){
  cin.tie(nullptr);
  ios_base::sync_with_stdio(false);
  ll res=0,buf=0;
  bool judge = true;
  ll n,d;cin>>n>>d;
  auto v=vec(n,2,0LL);
  rep(i,0,n)cin>>v[i][0]>>v[i][1];
  TwoSat sat(n);
  rep(i,0,n)rep(ti,0,2)rep(j,i+1,n)rep(tj,0,2){
    if(abs(v[i][ti]-v[j][tj])<d){
      sat.add_or(i,!ti,j,!tj);
    }
  }
  judge=sat.solve(true);
  ans1(judge);
  if(judge){
    rep(i,0,n)cout<<v[i][sat.ans[i]]<<endl;
  }
  return 0;
}

Measured memory_bytes: 3952