import java.util.Scanner;
public class replaceWhiteSpacesToSpecificCharacterInSentence
{
    public static void main(String[] args)
    {
        String sen="",wd="";
        char ch=' ',ch1=' ';
        int i=0,len=0;
        Scanner sc = new Scanner(System.in);

        System.out.println("Enter a sentence");
        sen = sc.nextLine();
        System.out.println("Enter the character that replaces white spaces");
        ch1 = sc.next().charAt(0);


        len=sen.length();
        for(i=0;i< len;i++)
        {
            ch=sen.charAt(i);
            if(ch==' '||i==(len-1))
            {
                wd=wd+ch1;
                System.out.print(wd);
                wd="";
            }
            else
            {
               wd=wd+ch;
            }


        }


    }
}