package main

import (
	"bufio"
	"fmt"
	"net/url"
	"os"
)

func main() {
	scanner := bufio.NewScanner(os.Stdin)

	for scanner.Scan() {
		inputURL := scanner.Text()
		parsedURL, err := url.Parse(inputURL)
		if err != nil {
			fmt.Fprintf(os.Stderr, "Error parsing URL: %v\n", err)
			continue
		}
		fmt.Println(parsedURL.Host)
	}

	if err := scanner.Err(); err != nil {
		fmt.Fprintf(os.Stderr, "Error reading input: %v\n", err)
	}
}