// Lit stdin ligne par ligne, et remplace toutes les IPv6 lues sur la ligne par leur equivalent 
// en affichant tous les bits
// Ex: 'ceci est une ipv6 : dead:beef::1' => 'ceci est une ipv6 : dead:beef:0000:0000:0000:0000:0000:00001'
//
package main

import (
	"os"
	"fmt"
	"bufio"
	"errors"
	"regexp"
	"strings"
	"net/netip"
)

var ErrInvalidAddress = errors.New("invalid address")

func main() {
	var dest []string
	var newline string
	
	// From https://stackoverflow.com/a/17871737
	regexv6 := `(([0-9a-fA-F]{1,4}:){7,7}[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,7}:|([0-9a-fA-F]{1,4}:){1,6}:[0-9a-fA-F]{1,4}|([0-9a-fA-F]{1,4}:){1,5}(:[0-9a-fA-F]{1,4}){1,2}|([0-9a-fA-F]{1,4}:){1,4}(:[0-9a-fA-F]{1,4}){1,3}|([0-9a-fA-F]{1,4}:){1,3}(:[0-9a-fA-F]{1,4}){1,4}|([0-9a-fA-F]{1,4}:){1,2}(:[0-9a-fA-F]{1,4}){1,5}|[0-9a-fA-F]{1,4}:((:[0-9a-fA-F]{1,4}){1,6})|:((:[0-9a-fA-F]{1,4}){1,7}|:)|fe80:(:[0-9a-fA-F]{0,4}){0,4}%[0-9a-zA-Z]{1,}|::(ffff(:0{1,4}){0,1}:){0,1}((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])|([0-9a-fA-F]{1,4}:){1,4}:((25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9])\.){3,3}(25[0-5]|(2[0-4]|1{0,1}[0-9]){0,1}[0-9]))`

	regex := regexp.MustCompile(regexv6)

	reader := bufio.NewReader(os.Stdin)
	for {
		dest = dest[:0]
		line, err := reader.ReadString('\n')
		if err != nil {
			fmt.Printf("%v\n", err)
			return
		}
		newline = line
		src := regex.FindAllString(line, -1)
		if len(src) > 0 {
			for _, s := range src {
				addr, _ := netip.ParseAddr(s)
				dest = append(dest, addr.StringExpanded())
			}
			for i, s := range src {
				newline = strings.Replace(newline, s, dest[i], 1)
			}
		}
		fmt.Printf(newline)
	}
	return
}