def solve():
    n, m = map(int, input().split())
    A = set(map(int, input().split()))
    B = set(map(int, input().split()))

    if not A:
        print("Yes")
        for b in B:
            print("Blue", b)
        return
    if not B:
        print("Yes")
        for a in A:
            print("Red", a)
        return

    same = A & B
    if len(same) == 0:
        print("No")
        return
    print("Yes")
    A -= same
    B -= same
    p = same.pop()
    for a in A:
        print("Red", a)
    print("Red", p)
    print("Blue", p)
    for b in B:
        print("Blue", b)

    r = "Red"
    b = "Blue"
    for p in same:
        print(b, p)
        print(r, p)
        r, b = b, r


for _ in range(int(input())):
    solve()