#include <bits/stdc++.h>
//#include <atcoder/all>
//using namespace atcoder;
using namespace std;
const int INF = 1e9;
using ll = long long;
using inv = vector<int>;
using stv = vector<string>;
using pint = pair<int,int>;
#define FOR(i,l,r) for(int i=(l); i<(r); i++)
#define rep(i,r) for(int i=0; i<(r); i++)
#define repl(i,r) for(long long i=0; i<(r); i++)
#define FORl(i,l,r) for(long long i=(l); i<(r); i++)
#define INFL ((1LL<<62)-(1LL<<31))
#define pb(x) push_back(x)
#define CIN(x) cin >> x

int main(){
  int T;
  cin >> T;

  rep(q,T){
    int N,M;
    cin >> N >> M;

    set<ll> A,B;
    rep(i,N){
      ll c;
      cin >> c;
      A.insert(c);
    } 
    rep(i,M){
      ll c;
      cin >> c;
      B.insert(c);
    }

    if(!N || !M){
      if(!N){
        cout << "Yes" << endl;
        for(auto b: B){
          cout << "Blue " << b << endl;

        }
        continue;
      }else{
        cout << "Yes" << endl;
        for(auto a: A){
          cout << "Red " << a << endl;
        }
        continue;
      }

    }

    set<ll> S; // 共通のやつ

    for(auto C:A){
      if(B.find(C) != B.end()){
        S.insert(C);
        B.erase(C);
        A.erase(C);
      }
    }

    if(S.empty() && !A.empty() && !B.empty()){
      cout << "No" << endl;
      continue;
    }
    
    cout << "Yes" << endl;

    bool nowA = true;

    if(A.empty()){      
      nowA = false;
    }
    if(B.empty()){
      nowA = true;
    }

    if(!nowA){
      for(auto b:B){
        cout << "Blue " << b << endl;
      }
      for(auto s:S){
        cout << (nowA ? "Red ":"Blue ") << s << endl;
        cout << (!nowA ? "Red ":"Blue ") << s << endl;
        nowA = !nowA;
      }
      continue;
    }
    else if(B.empty()){
      for(auto a:A){
        cout << "Red " << a << endl;
      }
      for(auto s:S){
        cout << (nowA ? "Red ":"Blue ") << s << endl;
        cout << (!nowA ? "Red ":"Blue ") << s << endl;
        nowA = !nowA;
      }
      continue;
    }else{
      bool first = true;
      for(auto a:A){
        cout << "Red " << a << endl;
      }
      for(auto s:S){
        cout << (nowA ? "Red ":"Blue ") << s << endl;
        cout << (!nowA ? "Red ":"Blue ") << s << endl;
        if(first){
          for(auto b: B){
            cout << "Blue " << b << endl;
          }
        }
        nowA = !nowA;

        first = false;
      }
    }


  }
  return 0;
}