帮帮~~！

#include<iostream>
using namespace std;
int main() 
{
	string a;
	int la,t;
	cin>>a;
	la=a.size();
	for(int i=1;i<=la;i++)
		if(a[i]=='2' or a[i]=='6' or a[i]=='9' or a[i]=='0')
			{t++;}
		else if(a[i]=='8')
			{t+=2;}
	cout<<t;
	return 0;
}