public class CheckString{
public static void main(String[] args) {
String str="Where there is will, there is a way";
String stcheck="is";
int count=0;
String arr[]=str.split(" ");
for(int i=0;i<arr.length;i++){
if(arr[i].equals(stcheck)){
    count++;
}
}
if(count==1){
    System.out.println("String is unique.");
}
else{
    System.out.println("String is not unique.");
}
}
 }