For problem statement at 2000-2999/2100-2199/2170-2179/2172/problemE.txt this is a correct solution, but verifier at 2000-2999/2100-2199/2170-2179/2172/verifierE.go ends with All 201 tests passed can you fix the verifier? ```go
package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

func nextPermutation(a []byte) bool {
	i := len(a) - 2
	for i >= 0 && a[i] >= a[i+1] {
		i--
	}
	if i < 0 {
		return false
	}
	j := len(a) - 1
	for a[j] <= a[i] {
		j--
	}
	a[i], a[j] = a[j], a[i]
	for l, r := i+1, len(a)-1; l < r; l, r = l+1, r-1 {
		a[l], a[r] = a[r], a[l]
	}
	return true
}

func gen(s string) []string {
	a := []byte(s)
	res := []string{string(a)}
	for nextPermutation(a) {
		res = append(res, string(a))
	}
	return res
}

func main() {
	in := bufio.NewReader(os.Stdin)
	out := bufio.NewWriter(os.Stdout)
	defer out.Flush()

	perms := make(map[int][]string)
	for _, n := range []int{12, 123, 1234} {
		perms[n] = gen(strconv.Itoa(n))
	}

	var t int
	fmt.Fscan(in, &t)
	for ; t > 0; t-- {
		var n, j, k int
		fmt.Fscan(in, &n, &j, &k)
		a := perms[n][j-1]
		b := perms[n][k-1]
		x := 0
		for i := 0; i < len(a); i++ {
			if a[i] == b[i] {
				x++
			}
		}
		fmt.Fprintf(out, "%dA%dB\n", x, len(a)-x)
	}
}
```