// #pragma GCC target("avx")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")

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

#define rep(i,n) for(int i = 0; i < (int)n; i++)
#define FOR(n) for(int i = 0; i < (int)n; i++)
#define repi(i,a,b) for(int i = (int)a; i < (int)b; i++)
#define all(x) x.begin(),x.end()
//#define mp make_pair
#define vi vector<int>
#define vvi vector<vi>
#define vvvi vector<vvi>
#define vvvvi vector<vvvi>
#define pii pair<int,int>
#define vpii vector<pair<int,int>>

template<typename T>
void chmax(T &a, const T &b) {a = (a > b? a : b);}
template<typename T>
void chmin(T &a, const T &b) {a = (a < b? a : b);}

using ll = long long;
using ld = long double;
using ull = unsigned long long;

const ll INF = numeric_limits<long long>::max() / 2;
const ld pi = 3.1415926535897932384626433832795028;
const ll mod = 998244353;
int dx[] = {1, 0, -1, 0, -1, -1, 1, 1};
int dy[] = {0, 1, 0, -1, -1, 1, -1, 1};

#define int long long

void red(int a) {
    cout << "Red " << a << "\n";
}
void blue(int b) {
    cout << "Blue " << b << "\n";
}

void solve() {
    int n, m;
    cin >> n >> m;
    vi a(n), b(m);
    FOR(n) cin >> a[i];
    FOR(m) cin >> b[i];
    sort(all(a));
    sort(all(b));

    if(n == 0) {
        cout << "Yes" << endl;
        for(auto e : b) blue(e);
        return;
    }else if(m == 0) {
        cout << "Yes" << endl;
        for(auto e : a) red(e);
        return;
    }

    unordered_map<int, bool> in_a;
    for(auto e : a) in_a[e] = true;
    unordered_map<int, bool> same;
    for(auto e : b) if(in_a[e]) {
        same[e] = true;
    }

    const int sz = (int)same.size();

    if((int)sz == 0) {
        cout << "No" << endl;
        return;
    }

    cout << "Yes" << endl;

    if(n > sz) { 
        bool flag = false;
        int cur = sz%2;
        for(auto e : same) {
            if(cur == 0) {
                red(e.first);
                blue(e.first);
                if(!flag) {
                    FOR(m) if(same.find(b[i]) == same.end()) blue(b[i]);
                    flag = true;
                }
            }else {
                if(!flag) {
                    FOR(m) if(same.find(b[i]) == same.end()) blue(b[i]);
                    flag = true;
                }
                blue(e.first);
                red(e.first);
            }
            cur ^= 1;
        }
        FOR(n) if(same.find(a[i]) == same.end()) red(a[i]);
    }else {
        bool flag = false;
        int cur = (1-(sz%2));
        for(auto e : same) {
            if(cur == 0) {
                if(!flag) {
                    FOR(n) if(same.find(a[i]) == same.end()) red(a[i]);
                    flag = true;
                }
                red(e.first);
                blue(e.first);
            }else {
                blue(e.first);
                red(e.first);
                if(!flag) {
                    FOR(n) if(same.find(a[i]) == same.end()) red(a[i]);
                    flag = true;
                }
            }
            cur ^= 1;
        }
        FOR(m) if(same.find(b[i]) == same.end()) blue(b[i]);
    }
}

signed main() {
    cin.tie(nullptr);
    ios::sync_with_stdio(false);
    int t;
    cin >> t;
    while(t--) solve();
    return 0;
}