#include<bits/stdc++.h> using namespace std; int main(){

int a=0;
char s[100001];
cin.getline(s,100001);
for(int i=0;i<strlen(s);i++){
	if(s[i]=='a') a+=1;
	if(s[i]=='b') a+=2;
	if(s[i]=='c') a+=3;
	if(s[i]=='d') a+=1;
	if(s[i]=='e') a+=2;
	if(s[i]=='f') a+=3;
	if(s[i]=='g') a+=1;
	if(s[i]=='h') a+=2;
	if(s[i]=='i') a+=3;
	if(s[i]=='j') a+=1;
	if(s[i]=='k') a+=2;
	if(s[i]=='l') a+=3;
	if(s[i]=='m') a+=1;
	if(s[i]=='n') a+=2;
	if(s[i]=='o') a+=3;
	if(s[i]=='p') a+=1;
	if(s[i]=='q') a+=2;
	if(s[i]=='r') a+=3;
	if(s[i]=='s') a+=4;
	if(s[i]=='t') a+=1;
	if(s[i]=='u') a+=2;
	if(s[i]=='v') a+=3;
	if(s[i]=='w') a+=1;
	if(s[i]=='x') a+=2;
	if(s[i]=='y') a+=3;
	if(s[i]=='z') a+=4;
	if(s[i]==' ') a+=1;
}
cout<<a;

return 0;

}