# test case 00 RE出る、なんでだろうね

T = int(input())
for t in range(T):
    N, M = map(int, input().split())
    A_list = list(map(int, input().split()))
    B_list = list(map(int, input().split()))
    A_set = set(A_list)
    B_set = set(B_list)
    A_solo = []
    double = []
    for a in A_list:
        if a in B_set:
            double.append(a)
        else:
            A_solo.append(a)
    B_solo = []
    for b in B_list:
        if b not in A_set:
            B_solo.append(b)
            
    #print(A_solo, double, B_solo)

    if N == 0 and M > 0:
        print('Yes')
        for b in B_list:
            print('Blue', b)
    elif N > 0 and M == 0:
        print('Yes')
        for a in A_list:
            print('Red', a)
    else:
        if len(double) == 0:
            print('No')
        else:
            print('Yes')
            #double = sorted(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])