import java.util.*;

import java.io.*;

class Main {

public static String StringChallenge(String str) {

// code goes here

str = str.toLowerCase();

char[] charArray = str.toCharArray();

for(int i = 0; i < charArray.length; i++) {

if(!(charArray[i] <= 90 && charArray[i] >= 65 || charArray[i] <= 122 && charArray[i] >= 97)) {

charArray[i] = ' ';

if(charArray[i] == ' ' && charArray[i+1] <= 122 && charArray[i+1] >= 97){

charArray[i+1] -= 32;

}

}

}

String str2 = String.copyValueOf(charArray);

str2 = str2.replaceAll("\s", "");

return str2;

}

public static void main (String[] args) {

// keep this function call here

Scanner s = new Scanner(System.in);

System.out.print(StringChallenge(s.nextLine()));

}

}