#include <bits/stdc++.h>

	using namespace std;

	int main()
	{
		int i,counter=0,x;
    		char a[205];
    		cin.getline(a,200);
    		i=0;
    		while(a[i]!='\0')
    		{
        		if(a[i]=='a'||a[i]=='d'||a[i]=='g'||a[i]=='j'||a[i]=='m'||a[i]=='p'||a[i]=='t'||a[i]=='w'||a[i]==' ')
            			counter++;
        		if(a[i]=='b'||a[i]=='e'||a[i]=='h'||a[i]=='k'	||a[i]=='n'||a[i]=='q'||a[i]=='u'||a[i]=='x')
            			counter=counter+2;
        		if(a[i]=='c'||a[i]=='f'||a[i]=='i'||a[i]=='l'	||a[i]=='o'||a[i]=='r'||a[i]=='v'||a[i]=='y')
            			counter=counter+3;
        		if(a[i]=='s'||a[i]=='z')
            			counter=counter+4;
       	 		i++;
    		}
    		cout<<counter;
    		return 0;
    	}