#include<bits/stdc++.h>
using namespace std;
int main()
{
	int num[26]={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};
	string in;
	int cnt;
	
	getline(cin, in);
	cnt = 0;
	for(int i=0;i<in.length();i++)
	{	
		if(in[i] != ' ')
			cnt+=num[in[i]-'a'];
		else
			cnt++;
	}
	
	cout << cnt;
	
	return 0;
}