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#include <bits/stdc++.h>
using namespace std ;
#define For(n) for(long long i = 0; i < n; i++)
#define endl '\n'
#define int long long
 
int mrseacrh (int arr[],int n,int x){
    int l =1;int r = n-1;int ans = r;
    while(l<=r){
        int mid = (l+r)/2;
        if(arr[mid] >= x){
            ans = mid;
            r = mid -1;
        }
        else l = mid +1;
    }
    return ans ;
}
void solve (){
    string t;cin>>t;
    int b=0,s=0,c=0;
    For(t.length()){
        if(t[i]=='B')b++;
        else if(t[i]=='C')c++;
        else s++;
    }
    int currb,currs,currc;cin>>currb>>currs>>currc;
    int priceb,prices,pricec;cin>>priceb>>prices>>pricec;
    int rubls ;cin>>rubls;
    if(b==0){
        b =1;
        priceb = 0;
    }
    if(c==0){
        c=1;
        pricec = 0;
    }
    if(s==0){
        s=1;
        prices=0;
    }
    //stage
    int ans = min(currb/b ,currc/c);
    ans  = min (ans,currs/s);
        currb -= b*ans;
        currs -= s*ans;
        currc -= c*ans; 
   //stage 2
   if((b-currb)*priceb <=rubls)
        rubls -= (b-currb)*priceb;
   else {
        cout << ans << endl;
        return;
   }
   if((c-currc)*pricec <=rubls)
        rubls -= (c-currc)*pricec;
    else {
        cout << ans << endl;
        return;        
    }
   if((s-currs)*prices <=rubls)
        rubls -= (s-currs)*prices; 
   else {
        cout << ans << endl;
        return;       
   }
   ans ++;
   //stages3
    int totalcost = priceb*b+pricec*c+prices*s;
    ans += rubls/totalcost;
    cout << ans << endl;
 
}
 
signed main ()
{
    ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);    
    int t =1;
    // cin>>t;
    while (t--){
        solve();
    }    
}