#include<stdio.h>
int main()
{
	int a;
	char ch;
	while((ch= getchar()) != '\n')
	{
		a++;
		if(ch=='b'||ch=='e'||ch=='h'||ch=='k'||ch=='n'||ch=='q'||ch=='u'||ch=='x')
		{
		
			a+=1;
		}
		else if(ch=='c'||ch=='f'||ch=='i'||ch=='l'||ch=='o'||ch=='r'||ch=='v'||ch=='y')
		{
			a+=2;
		}
		else if(ch=='s'||ch=='z')
		{
			a+=3;
		}
	}
	printf("%d",a);
	return 0;
}