#include<bits/stdc++.h>
using namespace std;
int main()
{
	
	int s=0,b=0;
	char c[201];
	cin>>c[b];
	while (c[b]!='\n')
	{
		b++;
		c[b]=getchar();
		if (c[b]=='a'||c[b]=='d'||c[b]=='g'||c[b]=='j'||c[b]=='m'||c[b]=='p'||c[b]=='t'||c[b]=='w')
		{
			s++;
		}
		if (c[b]=='b'||c[b]=='e'||c[b]=='h'||c[b]=='k'||c[b]=='n'||c[b]=='q'||c[b]=='u'||c[b]=='x')
		{
			s+=2;
		}
		if (c[b]=='c'||c[b]=='f'||c[b]=='i'||c[b]=='l'||c[b]=='o'||c[b]=='r'||c[b]=='v'||c[b]=='y')
		{
			s+=3;
		}
		if (c[b]=='s'||c[b]=='z')
		{
			s+=4;
		}
		if (c[b]==' ')
		{
			s++;
		}
	}
	cout<<s;
	return 0;
}