#include<stdio.h>
#include<string.h>
int main()
{
	char str1[]={' ','a','d','g','j','m','p','t','w'};
	char str2[]={'b','e','h','k','n','q','u','x'};
	char str3[]={'c','f','i','l','o','r','v','y'};
	char str4[]={'s','z'};
	char str[201];
	gets(str);
	int i,j,count=0;
    for(j=0;str[j]!='\0';j++)
	for(i=0;i<=10;i++)
	{
		if(str1[i]==str[j])
		{count=count+1;}
		else  if(str2[i]==str[j])
		{count=count+2;}
		else if(str3[i]==str[j])
		{count=count+3;}
		else if(str4[i]==str[j])
		{count=count+4;}
	}
	printf("%d\n",count);
	return(0);
}