#include<bits/stdc++.h>
using namespace std;
int main()
{
	string a;
	getline(cin,a);
	int sum=0;
	int len=a.length();
	for(int i=0;i<len;i++)
	{
		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')
		{
				sum+=1;
				continue;
		}
	
		if(a[i]=='b'||a[i]=='e'||a[i]=='h'||a[i]=='k'||a[i]=='n'||a[i]=='q'||a[i]=='u'||a[i]=='y')
	{
				sum+=2;
				continue;
		}
		if(a[i]=='c'||a[i]=='f'||a[i]=='i'||a[i]=='l'||a[i]=='o'||a[i]=='r'||a[i]=='v'||a[i]=='z')
		{
				sum+=3;
				continue;
		}
		if(a[i]=='s'||a[i]=='z')
	{
				sum+=4;
				continue;
		}
		
		sum+=1;
	}
	cout<<sum;
	return 0;
}