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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);

    int T, s = 0;
    cin >> T;
    assert(1 <= T && T <= 200000);

    auto solve = [&](){
        int N, M;
        cin >> N >> M;
        s += N + M;
        assert(0 <= N && 0 <= M);
        vector<int> A(N), B(M), ab, a, b;
        for(auto &v : A){
            cin >> v;
            assert(1 <= v && v <= 1000000000);
        }
        for(auto &v : B){
            cin >> v;
            assert(1 <= v && v <= 1000000000);
        }

        sort(A.begin(), A.end());
        sort(B.begin(), B.end());
        set_intersection(A.begin(), A.end(), B.begin(), B.end(), inserter(ab, ab.end()));
        set_difference(A.begin(), A.end(), ab.begin(), ab.end(), inserter(a, a.end()));
        set_difference(B.begin(), B.end(), ab.begin(), ab.end(), inserter(b, b.end()));

        if(!a.empty() && !b.empty() && ab.empty()){
            cout << "No" << '\n';
            return;
        }

        cout << "Yes" << '\n';

        for(auto &v : b)cout << "Blue " << string(1000, '0') << v << '\n';

        if(!ab.empty()){
            cout << "Blue " << ab[0] << '\n';
            cout << "Red " << ab[0] << '\n';
        }

        for(auto &v : a)cout << "Red " << string(1000, '0') << v << '\n';

        for(int i = 1; i < ab.size(); i++){
            if(i & 1){
                cout << "Red " << string(1000, '0') << ab[i] << '\n';
                cout << "Blue " << string(1000, '0') << ab[i] << '\n';
            }else{
                cout << "Blue " << string(1000, '0') << ab[i] << '\n';
                cout << "Red " << string(1000, '0') << ab[i] << '\n';
            }
        }
    };

    while(T--) solve();

    assert(s <= 200000);
}