> 
> #include "iostream"
> #include "string"
> using namespace std;
> 
> int main()
> {
> 	//freopen("s.txt","r",stdin);
> 	int t;
> 	int p,w;
> 	int i,temp;
> 	unsigned long sum;
> 	string s;
> 
> 	cin >> t;
> 	while (t--)
> 	{
> 		cin >> p >> w;
> 		cin.get();
> 		getline(cin, s);
> 
> 		sum = 0;
> 		for (i=0; i<s.length(); i++)
> 		{
> 			if (s[i] >= 'A' && s[i] <= 'C')
> 			{
> 				temp = s[i]-'A'+1;
> 				sum += (temp*p);
> 				
> 				if (i == s.length()-1)
> 					break;
> 
> 				if (s[i+1] >= 'A' && s[i+1] <= 'C')
> 					sum += w;
> 			}
> 			else if (s[i] >= 'D' && s[i] <= 'F')
> 			{
> 				temp = s[i]-'D'+1;
> 				sum += (temp*p);
> 
> 				if (i == s.length()-1)
> 					break;
> 				if (s[i+1] >= 'D' && s[i+1] <= 'F')
> 					sum += w;
> 			}
> 			else if (s[i] >= 'G' && s[i] <= 'I')
> 			{
> 				temp = s[i]-'G'+1;
> 				sum += (temp*p);
> 				if (i == s.length()-1)
> 					break;
> 				if (s[i+1] >= 'G' && s[i+1] <= 'I')
> 					sum += w;
> 			}
> 			else if (s[i] >= 'J' && s[i] <= 'L')
> 			{
> 				temp = s[i]-'J'+1;
> 				sum += (temp*p);
> 				if (i == s.length()-1)
> 					break;
> 				if (s[i+1] >= 'J' && s[i+1] <= 'L')
> 					sum += w;
> 			}
> 			else if (s[i] >= 'M' && s[i] <= 'O')
> 			{
> 				temp = s[i]-'M'+1;
> 				sum += (temp*p);
> 				if (i == s.length()-1)
> 					break;
> 				if (s[i+1] >= 'M' && s[i+1] <= 'O')
> 					sum += w;
> 			}
> 			else if (s[i] >= 'P' && s[i] <= 'S')
> 			{
> 				temp = s[i]-'P'+1;
> 				sum += (temp*p);
> 				if (i == s.length()-1)
> 					break;
> 				if (s[i+1] >= 'P' && s[i+1] <= 'S')
> 					sum += w;
> 			}
> 			else if (s[i] >= 'T' && s[i] <= 'V')
> 			{
> 				temp = s[i]-'T'+1;
> 				sum += (temp*p);
> 				if (i == s.length()-1)
> 					break;
> 				if (s[i+1] >= 'T' && s[i+1] <= 'V')
> 					sum += w;
> 			}
> 			else if (s[i] >= 'W' && s[i] <= 'Z')
> 			{
> 				temp = s[i]-'W'+1;
> 				sum += (temp*p);
> 				if (i == s.length()-1)
> 					break;
> 				if (s[i+1] >= 'W' && s[i+1] <= 'Z')
> 					sum += w;
> 			}
> 			else
> 			{
> 				sum += p;
> 				if (i == s.length()-1)
> 					break;
> 
> 				if (s[i+1] == ' ')
> 					sum += w;
> 			}
> 		}
> 		cout << sum << endl;
> 	}
> 	return 0;
> }
>