#include <bits/stdc++.h>

using namespace std;

void solve(){
    int n, c, b;
    cin >> n >> c >> b;
    int c_db, b_db, v_db;
    c_db = b_db = v_db = 0;
    char t;
    for(int i = 0; i < n; i++){
        cin >> t;
        switch(t){
        case 'C':
            c_db++;
            break;
        case 'B':
            b_db++;
            break;
        case 'V':
            v_db++;
            break;
        }
    }

    int c_csinal = min(c_db, c/2);
    c -= c_csinal*2;
    int b_csinal = min(b_db, b/2);
    b -= b_csinal*2;
    int v_csinal = min(v_db, min(b, c));
    cout << c_csinal + b_csinal + v_csinal << "\n";
}

int main()
{
    ios::sync_with_stdio(false);
    cin.tie(NULL);

    int t;
    cin >> t;
    while(t--){
        solve();
    }
}