#include<iostream>
using namespace std;
int main()
{
	string s;int sum=0,a[27]={0,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,1,2,3,4,1,2,3,1,2,3,4};
	getline(cin,s);
	for(int i=0;i<s.length();i++)
	{
		if(s[i]>='a'&&s[i]<='z')
		sum+=a[s[i]-96];
		else
		sum++;
		 
	}
	cout<<sum;
	return 0;
}