#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using P = pair<ll,ll>;
#define fix(x) fixed << setprecision(x)
#define asc(x) x, vector<x>, greater<x>
#define rep(i, n) for(ll i = 0; i < n; i++)
#define all(x) (x).begin(),(x).end()
template<class T>bool chmin(T&a, const T&b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool chmax(T&a, const T&b){if(a<b){a=b;return 1;}return 0;}
constexpr ll INFLL = (1LL << 62), MOD = 998244353;
constexpr int INF = (1 << 30);

int main(){
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int t;
    cin >> t;
    rep(houren,t){
        int n,m,a;
        cin >> n >> m;
        set<int> se;
        vector<int> ok, ng;
        rep(i,n){
            cin >> a;
            se.insert(a);
        }
        rep(i,m){
            cin >> a;
            if(se.count(a)){
                se.erase(a);
                ok.push_back(a);
            }else{
                ng.push_back(a);
            }
        }
        if(se.size()&&ng.size()&&!ok.size()){
            cout << "No\n";
        }else{
            cout << "Yes\n";
            for(int x:se) cout << "Red " << x << '\n';
            if(ok.size()) cout << "Red " << ok[0] << '\n';
            if(ok.size()) cout << "Blue " << ok[0] << '\n';
            for(int x:ng) cout << "Blue " << x << '\n';
            for(int i=1;i<ok.size();i++){
                if(i&1){
                    cout << "Blue " << ok[i] << '\n';
                    cout  << "Red " << ok[i] << '\n';
                }else{
                    cout << "Red " << ok[i] << '\n';
                    cout << "Blue " << ok[i] << '\n';
                }
            }
        }
    }
    return 0;
}