For problem statement at 0-999/600-699/690-699/691/problemB.txt this is a correct solution, but verifier at 0-999/600-699/690-699/691/verifierB.go ends with All tests passed can you fix the verifier? ```go
package main

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

func main() {
	scanner := bufio.NewScanner(os.Stdin)
	scanner.Scan()
	s := scanner.Text()
	
	valid := map[byte]bool{
		'A': true, 'H': true, 'I': true, 'M': true, 'O': true, 
		'T': true, 'U': true, 'V': true, 'W': true, 'X': true, 'Y': true,
		'o': true,
	}
	
	n := len(s)
	for i := 0; i < n; i++ {
		if !valid[s[i]] {
			fmt.Println("NIE")
			return
		}
	}
	
	for i := 0; i < n/2; i++ {
		if s[i] != s[n-1-i] {
			fmt.Println("NIE")
			return
		}
	}
	
	fmt.Println("TAK")
}
```