import java.util.Scanner;
import java.lang.Math;
public class Main2{
public static void main(String[] args) {
Scanner First = new Scanner(System.in);
double form = First.nextDouble();
double a = (int)(form/1000000000);
double b = (int)((form/10000000*10)*0.1);
double c = (int)((form/1000000*10)*0.1) - b*10;
double d = (int)((form/100000*10)*0.1) - b*100 - c*10;
double e = (int)((form/10000*10)*0.1) - b*1000 - c*100 - d*10;
double f = (int)((form/1000*10)*0.1) - b*10000 - c*1000 - d*100 - e*10;
double g = (int)((form/100*10)*0.1) - b*100000 - c*10000 - d*1000 - e*100 - f*10;
double h = (int)((form/10*10)*0.1) - b*1000000 - c*100000 - d*10000 - e*1000 - f*100 - g*10;
double i = (int)((form/1*10)*0.1) - b*10000000 - c*1000000 - d*100000 - e*10000 - f*1000 - g*100 - h*10;
double x = (a*1 + b*2 + c*3 + d*4 + e*5 + f*6 + g*7 + h*8 + i*9)%11;
double equation = (a*1000000000 + b*100000000 + c*10000000 + d*1000000 + e*100000 + f*10000 + g*1000 + h*100 + i*10 + x);
System.out.printf("%d", (int)(a));
System.out.printf("%d", (int)(b));
System.out.printf("%d", (int)(c));
System.out.printf("%d", (int)(d));
System.out.printf("%d", (int)(e));
System.out.printf("%d", (int)(f));
System.out.printf("%d", (int)(g));
System.out.printf("%d", (int)(h));
System.out.printf("%d", (int)(i));
if(x==10){
System.out.printf("X");
}
else{
System.out.printf("%d", (int)(x));
}
}
}
