import sys
input = sys.stdin.readline
from collections import Counter

T=int(input())
for tests in range(T):
    N,M=map(int,input().split())
    A=list(map(int,input().split()))
    B=list(map(int,input().split()))

    CA=Counter(A)
    CB=Counter(B)

    SAME=[]

    for c in CA:
        if CA[c]>0 and CB[c]>0:
            MIN=min(CA[c],CB[c])
            SAME+=[c]*MIN
            CA[c]-=MIN
            CB[c]-=MIN


    if len(SAME)==0 and A and B:
        print("No")
        continue
    
    print("Yes")

    ANS=[]
    for i in range(len(SAME)):
        if i%2==0:
            ANS.append(("Red",SAME[i]))
            ANS.append(("Blue",SAME[i]))
        else:
            ANS.append(("Blue",SAME[i]))
            ANS.append(("Red",SAME[i]))

    X=[]
    for c in CA:
        for i in range(CA[c]):
            X.append(("Red",c))

    Y=[]
    for c in CB:
        for i in range(CB[c]):
            Y.append(("Blue",c))

    ANS=X+ANS[0:2]+Y+ANS[2:]

    for x,y in ANS:
        print(x,y)