T = int(input())

for _ in range(T):
    N,M = map(int,input().split())
    A = list(map(int,input().split()))
    B = list(map(int,input().split()))
    a = set(A)
    b = set(B)
    c = a & b

    if N == 0:
        print('Yes')
        for bb in B:
            print('Blue',bb)
        continue
    if M == 0:
        print('Yes')
        for aa in A:
            print('Red',aa)
        continue
    if len(c) == 0:
        print('No')
        continue
    print('Yes')
    for aa in A:
        if aa not in c:
            print('Red',aa)

    u = c.pop()
    print('Red',u)
    print('Blue',u)
    for bb in B:
        if bb not in c and bb != u:
            print('Blue',u)
    now = True
    while c:
        u = c.pop()
        if now:
            print("Blue",u)
            print("Red",u)
        else:
            print('Red',u)
            print('Blue',u)
        now = not now