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

    A = list(map(int,input().split()))
    B = list(map(int,input().split()))

    sA = set(A)
    sB = set(B)
    sames = []
    for b in B:
        if b in sA:
            sames.append(b)

    
    if n == 0 or m == 0:
        for a in A:
            print(f"Red {a}")

        for b in B:
            print(f"Blue {b}")
        
        return

    
    if sames == []:
        print("No")
        return

    
    print("Yes")

    for a in A:
        if a not in sB:
            print(f"Red {a}")
        
    l = sames.pop()

    print(f"Red {l}")
    print(f"Blue {l}")

    for b in B:
        if b not in sA:
            print(f"Blue {b}")
    
    for i,l in enumerate(sames):

        if i%2:
            print(f"Red {l}")
            print(f"Blue {l}")
        else:
            print(f"Blue {l}")
            print(f"Red {l}")

    return 


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