For problem statement at 1000-1999/1400-1499/1470-1479/1473/problemC.txt this is a correct solution, but verifier at 1000-1999/1400-1499/1470-1479/1473/verifierC.go ends with All tests passed can you fix the verifier? package main

import (
	"bufio"
	"os"
	"strconv"
	"strings"
)

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 != '-' {
		if err != nil {
			return 0
		}
		c, err = fs.r.ReadByte()
	}
	if c == '-' {
		sign = -1
		c, err = fs.r.ReadByte()
		if err != nil {
			return 0
		}
	}
	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 sb strings.Builder
	for ; t > 0; t-- {
		n := in.NextInt()
		k := in.NextInt()
		s := 2*k - n
		first := true
		for i := 1; i < s; i++ {
			if !first {
				sb.WriteByte(' ')
			}
			first = false
			sb.WriteString(strconv.Itoa(i))
		}
		for i := k; i >= s; i-- {
			if !first {
				sb.WriteByte(' ')
			}
			first = false
			sb.WriteString(strconv.Itoa(i))
		}
		sb.WriteByte('\n')
	}

	out := bufio.NewWriterSize(os.Stdout, 1<<20)
	out.WriteString(sb.String())
	out.Flush()
}