#include <stdio.h>

int main(void) {
	// your code goes here
    int x,b0,b1,b2,b3,sum;
    scanf("%d",&x);
    b0=x%10;
    b3=x/1000;
b2=(x-b2*1000)/100;
b1=(x-b3*1000-b2*100)/10;
    printf("b0=%d\nb2=%d\nb1=%d\nb3=%d\n",b0,b2,b1,b3);
sum=b0+b1+b2+b3;
printf("sum=%d",sum);
	return 0;
}