# 貪欲法

T = int(input())
for t in range(T):
    N, M = map(int, input().split())
    A = set(map(int, input().split()))
    B = set(map(int, input().split()))
    A_solo = []
    A_double = []
    for a in A:
        if a in B:
            A_double.append(a)
        else:
            A_solo.append(a)
    B_solo = []
    B_double = []
    for b in B:
        if b in A:
            B_double.append(b)
        else:
            B_solo.append(b)

    #print(A_solo, A_double)
    #print(B_solo, B_double)

    if N == 0:
        print('Yes')
        for b in B:
            print('Blue', b)
    elif M == 0:
        print('Yes')
        for a in A:
            print('Red', a)
    else:
        if len(A_double) == 0:
            print('No')
        else:
            print('Yes')
            
            A_double = sorted(list(A_double))
            B_double = sorted(list(B_double))
            #print(A_solo, A_double, B_solo, B_double)
            for a in A_solo:
                print('Red', a)
            print('Red', A_double[0])
            print('Blue', B_double[0])
            for b in B_solo:
                print('Blue', b)
            for i in range(1, len(A_double)):
                if i%2 == 1:
                    print('Blue', B_double[i])
                    print('Red', A_double[i])
                else:
                    print('Red', A_double[i])
                    print('Blue', B_double[i])