// Source: https://usaco.guide/general/io

#include <bits/stdc++.h>
using namespace std;
#define int long long

const int MOD=20200111;

signed main() {
    int t;cin>>t;
    while(t--){
        int n,a,b;
        cin>>n>>a>>b;
        string s;cin>>s;
        int cnta=0, cntv=0, cntb=0;
        for(char c : s){
            if(c=='B')cnta++;
            if(c=='C')cntb++;
            if(c=='V')cntv++;
        }
        //cout<<cnta<<' '<<cntb<<' '<<cntv<<endl;
        int ans=0;
        for(int i = 0;i<=cntv;i++){
            int costa=i,costb=i;
            if(costa<=a&&costb<=b){
                ans=max(ans,i+min(a/2,cnta)+min(b/2,cntb));
            }
            else{
                break;
            }
        }cout<<ans<<endl;
    }
}