package main

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

func main() {
	input := bufio.NewScanner(os.Stdin)
	var output string
	for input.Scan() {
		line := input.Text()

		output = replaceSpace(line)
		fmt.Println(output)
	}
}

func replaceSpace(s string) string {
	var last string
	for _, v := range s {
		if string(v) == " " {
			last += "%20"
			continue
		}
		last += string(v)
	}
	return last
}