#include<algorithm>
#include<iostream>
#include<cstring>
#include<iomanip>
#include<bitset>
#include<cmath>
#include<queue>
using namespace std;
string a[10]={"","","abc","def","ghi","jkl","mno","pqrs","tuv","wxyz"};
int main(){
	string s;
	int an=0,k;
	getline(cin,s);
	for(int i=0;i<s.size();i++){
		if(s[i]==' ')
		  an++;
		else
		  for(int j=2;j<10;j++)
		  	if(k=a[j].find(s[i])>=0){
		  		an+=(k+1);
		  		break;
			}
	}
	cout<<an;
	return 0;
}