#include<iostream>
#include<cstring>
using namespace std;
int phone[27] = {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 s;
int ans;
int main(){
	getline(cin,s);
    for(int i = 0;i < s.size();i++){
    	if(s[i] == ' ')ans += 1;
	    else{
	    	int num = s[i] - 'a';
	    	ans += phone[num];
		}
	}
	cout<<ans;
}