include
int sum(int n)
{
int sum=0,s;
while(n!=0){
s=n%10;n=n/10;
sum=sum*10+s;
}
return sum;
}
int main(void) {
int m,n,res,a,b;
scanf("%d%d",&a,&b);
m=sum(a);
n=sum(b);
res=m+n;
if(res/10==0)
{
printf("%d",sum(res)/10);
}
else
printf("%d",sum(res));
return 0;
}