for _ in range(int(input())):
    n,m = map(int,input().split())
    a = set(map(int,input().split()))
    b = set(map(int,input().split()))
    if m==0:
        print("Yes")
        for v in a: print("Red",v)
        continue
    if n==0:
        print("Yes")
        for v in b: print("Blue",v)
        continue
    c = a&b; a -= c; b -= c; f = 0
    if not c: print("No"); continue
    print("Yes")
    for v in a: print("Red",v)
    v = c.pop(); print("Red",v); print("Blue",v)
    for v in b: print("Blue",v)
    for v in c:
        if f: print("Red",v); print("Blue",v)
        else: print("Blue",v); print("Red",v)
        f ^= 1