t = int(input())

color = ["Red", "Blue"]

for _ in range(t):
  n, m = map(int, input().split())
  a = set(list(map(int, input().split())))
  b = set(list(map(int, input().split())))

  xs = a & b
  if len(a) > 0 and len(b) > 0 and len(xs) == 0:
    print("No")
    continue

  a -= xs
  b -= xs
  xs = list(xs)

  print("Yes")
  for x in b:
    print(f"{color[1]} {x}")

  if len(xs) > 0:
    x = xs.pop()
    print(f"{color[1]} {x}")
    print(f"{color[0]} {x}")

  for x in a:
    print(f"{color[0]} {x}")

  for i in range(len(xs)):
    print(f"{color[i % 2]} {xs[i]}")
    print(f"{color[1 - i % 2]} {xs[i]}")