#include<bits/stdc++.h>

using namespace std;

int main(){
	int a[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;
	getline(cin,s);
	int sum=0;
	for(int i=0;i<s.length();i++){
		if(s[i]==' ')  sum+=1;
		if(s[i]>='a'&&s[i]<='z') sum+=a[s[i]-'a'];  //可能有\n,\r 
	}	
	cout<<sum;

	return 0;
}

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