#include <stdio.h>
int main() {
int i = 0;
int j = 0;
int count = 0;
scanf("%d %d",&i,&j);
int tom =i^j;
while(tom)
{
tom=tom&(tom-1);
count++;
}
printf("%d ",count);
return 0;
}

#include <stdio.h>
int main() {
int i = 0;
int j = 0;
int count = 0;
scanf("%d %d",&i,&j);
int tom =i^j;
while(tom)
{
tom=tom&(tom-1);
count++;
}
printf("%d ",count);
return 0;
}