#include<iostream>
#include<cstring>
using namespace std;
int main(void){
    int a[]={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}, sum=0;
    string b;
    getline(cin, b);
    for(int i=0; i<b.size(); i++)
    {
    	if(b[i]!=' ') sum+=a[b[i]-'a'];
    	else sum+=1;
	}
    cout<<sum<<endl;
    system("pause");
    return 0;
}