#include <bits/stdc++.h>
using namespace std;
int main(void){
    int t;
    cin>>t;
    while(t--){
        int n,m;
        cin>>n>>m;
        set<int>s;
        for(int i=0;i<n;i++){
            int a;
            cin>>a;
            s.insert(a);
        }
        vector<int>ans1,ans2,ans3;
        for(int i=0;i<m;i++){
            int a;
            cin>>a;
            if(s.count(a)){
                ans1.push_back(a);
                s.erase(a);
            }else{
                ans3.push_back(a);
            }
        }
        for (auto &x : s)ans2.push_back(x);
        if(n==0){
            cout<<"Yes"<<endl;
            for(int i=0;i<ans3.size();i++){
                cout<<"Blue "<<ans3[i]<<endl;
            }
        }else if(m==0){
            cout<<"Yes"<<endl;
            for(int i=0;i<ans2.size();i++){
                cout<<"Red "<<ans2[i]<<endl;
            }
        }else if(ans1.size()==0){
            cout<<"No"<<endl;
        }else{
            cout<<"Yes"<<endl;
            for(int i=0;i<ans1.size();i++){
                if(i==0)for(int j=0;j<ans2.size();j++)cout<<"Red "<<ans2[j]<<endl;
                cout<<(i%2==0?"Red ":"Blue ")<<ans1[i]<<endl;
                cout<<(i%2==1?"Red ":"Blue ")<<ans1[i]<<endl;
                if(i==0)for(int j=0;j<ans3.size();j++)cout<<"Blue "<<ans3[j]<<endl;
            }
        }
    }
    return 0;
}