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

using ull = uint64_t;
using ll = int64_t;
using vi = vector<int>;
using vll = vector<ll>;
using vs = vector<string>;
using ld = long double;
using P = pair<ll,ll>;
using G = vector<vector<int>>;

#define LO(...) (void)0
#define debug(x) (void)0

#define reps(i,a,n) for(ll i##_len = (ll)(n), i = (a); i < i##_len; ++i)
#define rep(i,n) reps(i,0,(n))
#define rrep(i,n) reps(i,1,(n)+1)
#define repd(i,n) for(ll i=(n)-1;i>=0;i--)
#define rrepd(i,n) for(ll i=(n);i>=1;i--)

namespace std {template<typename T,typename U> istream &operator>>(istream &is, pair<T,U> &v){return is>>v.first>>v.second;}}

template<typename T>void input(T& a){cin>>a;}
template<typename T,typename... Ts>void input(T& a,Ts&... b){cin>>a;input(b...);}
#define inp(...) ll __VA_ARGS__;input(__VA_ARGS__)
#define inps(...) string __VA_ARGS__;input(__VA_ARGS__)
#define inpp(p) cin >> (p).first >> (p).second
#define inpv(v,N) vll v(N);rep(i,N)cin>>v[i];
#define inpvs(v,N) vs v(N);rep(i,N)cin>>v[i];
#define all(v) begin(v),end(v)
#define Yes cout<<"Yes\n"
#define No cout<<"No\n"
#define allok(i,N,pred) [&]()->bool{bool allok_=1;rep(i,N)if(!(pred))allok_=0;return allok_;}()
#define anyok(i,N,pred) [&]()->bool{bool anyok_=0;rep(i,N)if(pred)anyok_=1;return anyok_;}()
inline void YESNO(bool b){cout<<(b?"YES\n":"NO\n");}inline void yesno(bool b){cout<<(b?"yes\n":"no\n");}inline void YesNo(bool b){cout<<(b?"Yes\n":"No\n");}

#define SP cout<<' '
#define ENDL cout<<'\n'
#define setfp cout<<fixed<<setprecision(16)
template<typename C>string join(const C &v){ostringstream s;bool f=1;for(auto &&e:v){if(!f)s<<' ';f=0;s<<e;}return s.str();}
template<typename C>string joinadd(const C &v){ostringstream s;bool f=1;for(auto &&e:v){if(!f)s<<' ';f=0;s<<e+1;}return s.str();}
template<typename C>void prv_(const C &v){cout<<join(v);}
template<typename C>void prvadd_(const C &v){cout<<joinadd(v);}
template<typename C>void prv(const C &v){prv_(v);ENDL;}
template<typename C>void prvadd(const C &v){prvadd_(v);ENDL;}

template<typename ...>using rr_void_t=void;
template<typename T,typename=void>struct is_container:false_type{};
template<typename T>struct is_container<T,rr_void_t<typename T::iterator>>:true_type{};

template<typename T,typename=enable_if_t<is_container<T>::value && !is_same<string,T>::value>>
void pr_(const T& a){prv_(a);}
template<typename T,typename=enable_if_t<!is_container<T>::value || is_same<string,T>::value>,typename=void>
void pr_(const T& a){cout<<a;}
inline void pr(){cout<<'\n';}
template<typename T>void pr(const T& a){pr_(a);cout<<'\n';}
template<typename T,typename... Ts>void pr(const T& a,const Ts&... b){pr_(a);cout<<' ';pr(b...);}
template<typename T>void prs(const T& a){pr_(a);SP;}

inline ll max(ll a, ll b){return max<ll>(a, b);}
inline ll min(ll a, ll b){return min<ll>(a, b);}
template<typename T>bool chmax(T &a,const T &b){return a<b?(a=b,1):0;}
template<typename T>bool chmin(T &a,const T &b){return b<a?(a=b,1):0;}

template<typename T,typename C=less<>>void so(T &a,C c=C{}){sort(begin(a),end(a),c);}
template<typename T,typename C=less<>>void rso(T &a,C c=C{}){sort(rbegin(a),rend(a),c);}
template<typename T>void rev(T &a){reverse(begin(a),end(a));}

constexpr ll INF = 1e18;

int main() {
    inp(T);
    while(T--){
        inp(N,M);
        inpv(a,N);
        inpv(b,M);
        set<ll> as;
        rep(i,N)as.insert(a[i]);
        ll co = 0;
        vll no;
        vll aa;
        rep(i,M){
            if(as.count(b[i])){
                as.erase(b[i]);
                aa.push_back(b[i]);
                co++;
            }else{
                no.push_back(b[i]);
            }
        }
        if(N==0){
            Yes;
            rep(i,M){
                prs("Blue");
                pr(a[i]);
            }
        }else if(M==0){
            Yes;
            rep(i,M){
                prs("Blue");
                pr(a[i]);
            }
        }else if(co){
            Yes;
            for(ll c : as){
                prs("Red");
                pr(c);
            }
            ll t = 0;
            for(ll c : aa){
                prs(t%2 ? "Blue" : "Red");
                pr(c);
                prs(t%2 ? "Red" : "Blue");
                pr(c);
                if(t==0){
                    for(ll c : no){
                        prs("Blue");
                        pr(c);
                    }
                }
                t++;
            }
        }else{
            No;
        }
    }
}