#include <bits/stdc++.h>
using namespace std;
int ans;

int main()
{

string a;
getline(cin,a);
for(int i=1;i<=a.size();i++)
{
	if(a[i]==' ')
	{
		ans+=1;
	}
	if(a[i]=='a'||a[i]=='d'||a[i]=='g'||a[i]=='j'||a[i]=='m'||a[i]=='p'||a[i]=='t'||a[i]=='w')
	{
		ans+=1;
	}
	if(a[i]=='b'||a[i]=='e'||a[i]=='h'||a[i]=='k'||a[i]=='n'||a[i]=='q'||a[i]=='u'||a[i]=='x')
	{
		ans+=2;
	}
	if(a[i]=='c'||a[i]=='f'||a[i]=='i'||a[i]=='l'||a[i]=='o'||a[i]=='r'||a[i]=='v'||a[i]=='y')
	{
		ans+=3;
	}
	if(a[i]=='s'||a[i]=='z')
	{
		ans+=4;
	}
}
	

cout<<ans;


	return 0;
}