#include<bits/stdc++.h>
#include<string.h>
#include<string>
using namespace  std;
int a[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},ans;
char s[200];
int main()
{
	gets(s);
	int len=strlen(s);
	for(int i=0; i<len; i++)
	{
		if(int(s[i])>=int('a')&&int(s[i])<=int('z'))
		{
			ans+=a[int(s[i])-97];
		}
		else
		{
			ans+=1;
		}
	}
	printf("%d",ans);
}