#include<stdio.h>
int main(){
 int a=[
0,1,1,2,1,2,2,3,1,2,2,3,2,3,3,4,
1,2,2,3,2,/*..*/
1,2/*..*/];
 long c=0;
 int d,e;
 for(;;){
  d=getc(stdin);
  if(d<0)break;
  c+=a[d];}
 printf("%x\n",c);}