package main

import (
	"bufio"
	"bytes"
	"fmt"
	"os"
)

type FastScanner struct {
	r *bufio.Reader
}

func NewFastScanner() *FastScanner {
	return &FastScanner{r: bufio.NewReaderSize(os.Stdin, 1<<20)}
}

func (fs *FastScanner) NextInt() int {
	sign, val := 1, 0
	c, err := fs.r.ReadByte()
	for (c < '0' || c > '9') && c != '-' {
		c, err = fs.r.ReadByte()
		if err != nil {
			return 0
		}
	}
	if c == '-' {
		sign = -1
		c, _ = fs.r.ReadByte()
	}
	for c >= '0' && c <= '9' {
		val = val*10 + int(c-'0')
		c, err = fs.r.ReadByte()
		if err != nil {
			return sign * val
		}
	}
	fs.r.UnreadByte()
	return sign * val
}

func main() {
	in := NewFastScanner()
	t := in.NextInt()
	var out bytes.Buffer

	for ; t > 0; t-- {
		n := in.NextInt()
		m := in.NextInt()
		total := n * m

		a := make([]int, total)
		for i := 0; i < total; i++ {
			a[i] = in.NextInt()
		}

		row := make([]int, m)
		pos := 0
		ans := 0

		for i := 0; i < n; i++ {
			for j := 0; j < m; j++ {
				row[j] = in.NextInt()
			}

			v := a[pos]
			p := -1
			for j := 0; j < m; j++ {
				if row[j] == v {
					p = j
					break
				}
			}

			keep := 0
			if p != -1 {
				cand := m - p
				ok := true
				for j := 0; j < cand; j++ {
					if a[pos+j] != row[p+j] {
						ok = false
						break
					}
				}
				if ok {
					keep = cand
				}
			}

			ans += m - keep
			pos += keep
		}

		fmt.Fprintln(&out, ans)
	}

	fmt.Print(out.String())
}