#include <bits/stdc++.h>
#define int long long int
#define endl '\n'
using namespace std;
signed main()
{

int t;cin>>t;
while(t--)
{
int n,x,y,i;cin>>n;
string s;
cin>>s;
cin>>x>>y;
int a[n+1],b[n+1];
a[0]=0;b[0]=0;
for(i=0;i<n;i++)
{
if(s[i]=='E')
{
a[i+1]=a[i]+0;
}
else if(s[i]=='W')
{
a[i+1]=min(2ll*x,2ll*y)+a[i];
}
else if(s[i]=='N')
{
a[i+1]=min(x,3ll*y)+a[i];
}
else if(s[i]=='S')
{
a[i+1]=min(y,3ll*x)+a[i];
}
}
for(i=0;i<n;i++)
{
if(s[i]=='E')
{
b[i+1]=b[i]+min(2ll*x,2ll*y);
}
else if(s[i]=='W')
{
b[i+1]=0+b[i];
}
else if(s[i]=='N')
{
b[i+1]=min(y,3ll*x)+b[i];
}
else if(s[i]=='S')
{
b[i+1]=min(x,3ll*y)+b[i];
}
}
int ans=min(a[n],b[n]),z;
for(i=1;i<n;i++)
{
z= a[i]+b[n]-b[i];
ans=min(ans,z);
}
cout<<ans<<endl;
}
return 0;
}