#include<stdio.h>

int main(int argc, char const *argv[]){
	char num[11];
	int ans=1,i=0;
	scanf("%s",num);
	while(num[i]!='\0'){
		ans+=2;
		if(num[i]=='0' || num[i]=='4' || num[i]=='6' || num[i]=='9') ans++;
		if(num[i]=='8') ans+=2;
		i++;
	}
	printf("%d\n",ans);
	return 0;
}