For problem statement at 0-999/200-299/240-249/247/problemB.txt this is a correct solution, but verifier at 0-999/200-299/240-249/247/verifierB.go ends with All tests passed can you fix the verifier? package main

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

func padBlock(b string) string {
	if len(b) >= 4 {
		return b
	}
	return strings.Repeat("0", 4-len(b)) + b
}

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

	var n int
	if _, err := fmt.Fscan(in, &n); err != nil {
		return
	}

	for i := 0; i < n; i++ {
		var s string
		fmt.Fscan(in, &s)

		var result []string
		if strings.Contains(s, "::") {
			parts := strings.SplitN(s, "::", 2)
			leftPart, rightPart := parts[0], parts[1]

			var leftBlocks, rightBlocks []string
			if leftPart != "" {
				leftBlocks = strings.Split(leftPart, ":")
			}
			if rightPart != "" {
				rightBlocks = strings.Split(rightPart, ":")
			}

			for _, b := range leftBlocks {
				result = append(result, padBlock(b))
			}

			missing := 8 - (len(leftBlocks) + len(rightBlocks))
			for j := 0; j < missing; j++ {
				result = append(result, "0000")
			}

			for _, b := range rightBlocks {
				result = append(result, padBlock(b))
			}
		} else {
			blocks := strings.Split(s, ":")
			for _, b := range blocks {
				result = append(result, padBlock(b))
			}
		}

		fmt.Fprintln(out, strings.Join(result, ":"))
	}
}