#include <bits/stdc++.h>
// clang-format off
using namespace std; using ll=long long; using ull=unsigned long long; using pll=pair<ll,ll>; const ll INF=4e18;
void print0(){}; template<typename H,typename... T> void print0(H h,T... t){cout<<h;print0(t...);}
void print(){print0("\n");}; template<typename H,typename... T>void print(H h,T... t){print0(h);if(sizeof...(T)>0)print0(" ");print(t...);}
void perr0(){}; template<typename H,typename... T> void perr0(H h,T... t){cerr<<h;perr0(t...);}
void perr(){perr0("\n");}; template<typename H,typename... T>void perr(H h,T... t){perr0(h);if(sizeof...(T)>0)perr0(" ");perr(t...);}
void ioinit() { cout<<fixed<<setprecision(15); cerr<<fixed<<setprecision(6); ios_base::sync_with_stdio(0); cin.tie(0); }
#define debug1(a) { cerr<<#a<<":"<<a<<endl; }
#define debug2(a,b) { cerr<<#a<<":"<<a<<" "<<#b<<":"<<b<<endl; }
#define debug3(a,b,c) { cerr<<#a<<":"<<a<<" "<<#b<<":"<<b<<" "<<#c<<":"<<c<<endl; }
#define debug4(a,b,c,d) { cerr<<#a<<":"<<a<<" "<<#b<<":"<<b<<" "<<#c<<":"<<c<<" "<<#d<<":"<<d<<endl; }
// clang-format on
void solve() {
    ll N, M;
    cin >> N >> M;
    unordered_set<ll> A;
    unordered_set<ll> B;

    for (ll i = 0; i < N; i++) {
        ll x;
        cin >> x;
        A.insert(x);
    }
    for (ll i = 0; i < M; i++) {
        ll x;
        cin >> x;
        B.insert(x);
    }
    unordered_set<ll> p;
    unordered_set<ll> aa;
    unordered_set<ll> bb;
    for (auto x : A) {
        if (B.count(x)) {
            p.insert(x);
        } else {
            aa.insert(x);
        }
    }
    for (auto x : B) {
        if (A.count(x)) {
            ;
        } else {
            bb.insert(x);
        }
    }
    if (p.size() == 0) {
        if (aa.size() == 0) {
            print("Yes");
            for (auto x : bb) {
                print("Blue", x);
            }
        } else if (bb.size() == 0) {
            print("Yes");
            for (auto x : aa) {
                print("Red", x);
            }
        } else {
            print("No");
        }

    } else {
        print("Yes");
        for (auto x : aa) {
            print("Red", x);
        }
        ll xp = -1;
        for (auto x : p) {
            xp = x;
            print("Red", x);
            print("Blue", x);
            break;
        }
        for (auto x : bb) {
            print("Blue", x);
        }
        bool blue = true;
        for (auto x : p) {
            if (x == xp) continue;
            if (blue) {
                print("Blue", x);
                print("Red", x);
            } else {
                print("Red", x);
                print("Blue", x);
            }
            blue = !blue;
        }
    }
}
int main() {
    ioinit();
    ll T;
    cin >> T;
    while (T--) {
        solve();
    }
    return 0;
}