#include <bits/stdc++.h>
using namespace std;
#define rep(i, x, limit) for (long long i = (long long)x; i < (long long)limit; i++)
#define REP(i, x, limit) for (long long i = (long long)x; i <= (long long)limit; i++)
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define el '\n'
#define spa " "
#define Yes cout << "Yes" << el
#define No cout << "No" << el
#define YES cout << "YES" << el
#define NO cout << "NO" << el
#define eps (1e-10)
#define Equals(a,b) (fabs((a) - (b)) < eps )
#define debug(x) cerr << #x << " = " << x << el
using ll = long long;
using ull = unsigned long long;
using pii = pair<int,int>;
using pll = pair<ll,ll>;
using vi = vector<int>;
using vl = vector<ll>;
using vvl = vector<vector<ll>>;
using vs = vector<string>;
using vb = vector<bool>;
const double pi = 3.141592653589793238;
const int inf = 1073741823;
const ll infl = 1LL << 60;
const string ABC = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
const string abc = "abcdefghijklmnopqrstuvwxyz";
const ll MOD = 998244353;
#include<atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using vm = vector<mint>;

int main() {
  ios::sync_with_stdio(false);
  cin.tie(nullptr);
  ll t;cin>>t;
  while(t--){
  ll n,m;cin>>n>>m;
  vl A(n),B(m);
  rep(i,0,n+m){
    if(i<n)cin>>A[i];
    else cin>>B[i-n];
  }
  if(n==0){
    Yes;
    rep(i,0,m){
      cout<<"Blue"<<spa<<B[i]<<el;
    }
    continue;
  }else if(m==0){
    Yes;
    rep(i,0,n){
      cout<<"Red"<<spa<<A[i]<<el;
    }
    continue;
  }
  unordered_set<ll> As,Bs;
  for(auto a:A)As.insert(a);
  for(auto b:B)Bs.insert(b);
  vl Am,Bm,Cm;
  for(auto a:As){
    if(Bs.count(a))Cm.push_back(a);
    else Am.push_back(a);
  }
  for(auto b:Bs){
    if(As.count(b))continue;
    Bm.push_back(b);
  }
  ll c=Cm.size();
  if(c==0){
    No;
    continue;
  }
  Yes;
  int f=0;
  rep(i,0,c-1){
    cout<<(f==0?"Red":"Blue")<<spa<<Cm[i]<<el;
    cout<<(f==1?"Red":"Blue")<<spa<<Cm[i]<<el;
    f^=1;
  }
  if(f==0){
    for(auto a:Am){
      cout<<"Red"<<spa<<a<<el;
    }
  }else{
    for(auto b:Bm){
      cout<<"Blue"<<spa<<b<<el;
    }
  }
  cout<<(f==0?"Red":"Blue")<<spa<<Cm[c-1]<<el;
    cout<<(f==1?"Red":"Blue")<<spa<<Cm[c-1]<<el;
    if(f==1){
    for(auto a:Am){
      cout<<"Red"<<spa<<a<<el;
    }
  }else{
    for(auto b:Bm){
      cout<<"Blue"<<spa<<b<<el;
    }
  }
}
}