#include <bits/stdc++.h>
using namespace std;
char s[201],c;

int main() {
	int k=1,sum=0;
	for(scanf("%c",&c); c!='\n'; scanf("%c",&c)) {
		s[k++] = c;
	}
	int len = strlen(s+1);

	for(int i=1; i<=len; i++) {
		if(('a'<=s[i]&&s[i]<='o')) {
			sum+=(s[i]-'a')%3+1;
		} else if(('t'<=s[i]&&s[i]<='v')) {
			sum+=(s[i]-'t')%3+1;
		} else if('p'<=s[i]&&s[i]<='s') {
			sum+=(s[i]-'p')%4+1;
		} else if('w'<=s[i]&&s[i]<='z') {
			sum+=(s[i]-'w')%4+1;
		} else if(s[i]<=' '){
			sum++;
		}
	}
	printf("%d",sum);
	return 0;
}