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())))
    C = A & B
    if N==0:
        print("Yes")
        for b in B:
            print("Blue",b)
    elif M==0:
        print("Yes")
        for a in A:
            print("Red",a)
    elif len(C)==0:
        print("No")
    else:
        print("Yes")
        A = A-C
        B = B-C
        C = sorted(list(C))
        A = sorted(list(A))
        B = sorted(list(B))
        n = len(C)
        if n%2==1:
            for a in A:
                print("Red",a)
            for i in range(n):
                if i%2==0:
                    print("Red",C[i])
                    print("Blue",C[i])
                else:
                    print("Blue",C[i])
                    print("Red",C[i])
            for b in B:
                print("Blue",b)
        else:
            for a in A:
                print("Red",a)
            for i in range(n-1):
                if i%2==0:
                    print("Red",C[i])
                    print("Blue",C[i])
                else:
                    print("Blue",C[i])
                    print("Red",C[i])
            for b in B:
                print("Blue",b)
            print("Blue",C[n-1])
            print("Red",C[n-1])