T = int(input())
for t in range(T):
    N,M = map(int,input().split())
    A = set(map(int,input().split()))
    B = set(map(int,input().split()))
    CO = A & B
    AO = A - CO
    BO = B - CO
    NC = len(CO)
    NA = len(AO)
    NB = len(BO)

    if NC == 0 and NA > 0 and NB > 0:
        print("No")
        continue

    print("Yes")

    for i in AO:
        print("Red",i)

    st = 0
    for i in CO:
        if st == 0:
            print("Red",i)
            print("Blue",i)
        else:
            print("Blue",i)
            print("Red",i)
        st ^= 1

    for i in BO:
        print("Blue",i)