1.5

/*
Write a method to replace all spaces in a string with '%20'
*/

import java.util.Scanner;
public class ci_one_five {
	public static void main(String argsp[]){
		Scanner sc = new Scanner(System.in);
		String s = sc.nextLine();
		char ch[] = s.toCharArray();
		replaceSpace(ch,s.length());
//		String x = "";
//		int k = 0;
//		for(int i=0;i<s.length();i++){
//			char ch = s.charAt(i);
//			if(ch==' ')
//			x+="%20";
//			else
//			x+=ch;	
			
		//}
		//System.out.println(x);

	}
	public static void replaceSpace(char[] str,int length){
		int spaceCount=0,newLen,i=0;
		for(i=0;i<length;i++){
			if(str[i]==' ')spaceCount++;
		}
		newLen = length + spaceCount*2;
//		str[newLen] = '\0';
		System.out.println(str);
		char[] new_str = str; 
        str = new char[newLen];
        System.out.println(str);
		for(i=length-1;i>=0;i--){
			if(new_str[i]==' '){
				str[newLen-1] = '0';
				str[newLen-2] = '2';
				str[newLen-3] = '%';
				newLen-=3;
			}
			else{
				str[newLen-1] = new_str[i];
				newLen -=1;
			}
		}
		String m = new String(str);
		System.out.println(m);
	}

}