T = int(input())
NN = []
MM = []
AA = []
BB = []
for _ in range(T):
    n, m = map(int, input().split())
    a = list(map(int, input().split()))
    b = list(map(int, input().split()))
    NN.append(n)
    MM.append(m)
    AA.append(a)
    BB.append(b)
for i in range(T):
    try:
        N = NN[i]
        M = MM[i]
        A = AA[i]
        B = BB[i]
        if N>0 and M>0:
            setA = set(A)
            setB = set(B)
            same = []
            diff = []
            for b in B:
                if b in setA:
                    same.append(b)
                else:
                    diff.append(b)
            if len(same)==0:
                print("No")
                continue

            print("Yes")
            for d in diff:
                print("Blue", d)
            for i, s in enumerate(same):
                if i%2==0:
                    print("Blue", s)
                    print("Red", s)
                    if i==0:
                        for a in setA:
                            if a not in setB:
                                print("Red", a)
                else:
                    print("Red", s)
                    print("Blue", s)

        elif N>0:
            print("Yes")
            for a in A:
                print("Red", a)
        elif M>0:
            print("Yes")
            for b in B:
                print("Blue", b)
        else:
            print("Yes")
    except:
        print("No")