import sys
input = sys.stdin.readline


def main():
    T = int(input())
    for _ in range(T):
        N, M = map(int, input().split())
        A = set(map(int, input().split()))
        B = set(map(int, input().split()))
        pair = []
        ans = []
        while A:
            n = A.pop()
            if n in B:
                pair.append(n)
                B.discard(n)
            else:
                ans.append(f'Red {n}')
        if not pair:
            if M == 0:
                print('Yes')
                print(*ans, sep='\n')
            elif N == 0:
                print('Yes')
                while B:
                    print(f'Blue {B.pop()}')
            else:
                print('No')
            continue

        n = pair.pop()
        ans.append(f'Red {n}')
        ans.append(f'Blue {n}')
        while B:
            ans.append(f'Blue {B.pop()}')
        cur = 'Blue'
        while pair:
            n = pair.pop()
            if cur == 'Blue':
                ans.append(f'Blue {n}')
                ans.append(f'Red {n}')
                cur = 'Red'
            else:
                ans.append(f'Red {n}')
                ans.append(f'Blue {n}')
                cur = 'Blue'
        print('Yes')
        print(*ans, sep='\n')



main()