# 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 = []
    double = []
    for a in A:
        if a in B:
            double.append(a)
        else:
            A_solo.append(a)
    B_solo = []
    for b in B:
        if b not in A:
            B_solo.append(b)

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