package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd := bf.NewReader(Stdin)
	wr := bf.NewWriter(Stdout)
	defer wr.Flush()
	var t int
	Fscan(rd,&t)
	for ; t > 0; t-- {
		var n, m int
		Fscan(rd,&n,&m)
		conn := map[int]int{}
		a := make([]int, n)
		for i := range a {
			Fscan(rd, &a[i])
			conn[a[i]]++
		}
		ok := false
		b := make([]int, m)
		for i := range b {
			Fscan(rd,&b[i])
			conn[b[i]]++
			if conn[b[i]] == 2 {
				ok = true
			}
		}
		if n > 0 && m > 0 && !ok {
			Fprintln(wr, "No")
			continue
		}
		Fprintln(wr, "Yes")
		for _, v := range a {
			if conn[v] == 1 {
				Fprintln(wr, "Red", v)
			}
		}
		for _ , v := range a {
			if conn[v] == 2 {
				Fprintln(wr, "Red", v)
				Fprintln(wr, "Blue", v)
				conn[v] = 0
				break
			}
		}
		for _, v := range b {
			if conn[v] == 1 {
				Fprintln(wr, "Blue", v)
			}
		}
		blue := true
		for _, v := range b {
			if conn[v] == 2 {
				if blue {
					Fprintln(wr, "Blue", v)
					Fprintln(wr, "Red", v)
				} else {
					Fprintln(wr, "Red", v)
					Fprintln(wr, "Blue", v)
				}
				blue = !blue
			}
		}
	}
}