#include<iostream>
#include<string>
#include<iomanip>
using namespace std;
#define max 1000
int main(int argc, char* argv[])
{
double result;
int i;
char line[max];
l:
while(cin.getline(line, max))
{
int len = string(line).length();
result = 0.0;
for(i = 0; i < len; i++,i++)
{
switch(line[i])
{
case 'A':result += 4;break;
case 'B':result += 3;break;
case 'C':result += 2;break;
case 'D':result += 1;break;
case 'F':result += 0......
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