T=int(input())
for _ in range(T):
  n,m=map(int,input().split())
  a=set(list(map(int,input().split())))
  b=set(list(map(int,input().split())))
  if n==0:
    print("Yes")
    for v in b:
      print("Blue",v)
    continue
  if m==0:
    print("Yes")
    for v in a:
      print("Red",v)
    continue
  c=[]
  f=0
  for v in list(a):
    if v in b:
      c+=[[("Red",v),("Blue",v)]]
      a.discard(v)
      b.discard(v)
      f=1
  if f==0:
    print("No")
    continue
  print("Yes")
  for i in range(1,len(c),2):
    c[i]=c[i][::-1]
  c=[[("Red",v) for v in a]]+c[:1]+[[("Blue",v) for v in b]]+c[1:]
  for i in range(len(c)):
    for j in range(len(c[i])):
      print(*c[i][j])