#include <bits/stdc++.h>

using namespace std;

#define REP(i,n) for(int i=0; i<(int)(n); i++)
#define FOR(i,b,e) for (int i=(int)(b); i<(int)(e); i++)
#define ALL(x) (x).begin(), (x).end()

const double PI = acos(-1);

int calc(vector<int> &me, vector<int> &you) {
  int ret = 0;
  REP (i, me.size()) {
    if ((me[i] + 1) % 3 == you[i])
      ret += 3;
    else if (me[i] == you[i])
      ++ret;
  }
  return ret;
}

int main() {
  ios_base::sync_with_stdio(0);
  cin.tie(0);

  vector<int> me, you;

  REP (i, 3) {
    int c;
    cin >> c;
    REP (j, c) me.push_back(i);
  }

  string t;
  cin >> t;
  for (char c: t)
    you.push_back(string("GCP").find(c));

  bool update = true;
  int ret = calc(me, you);
  while (update) {
    update = false;
    REP (i, me.size()) REP (j, i) {
      if (me[i] != me[j]) {
        swap(me[i], me[j]);
        int tmp = calc(me, you);
        if (tmp > ret) {
          ret = tmp;
          update = true;
        } else {
          swap(me[i], me[j]);
        }
      }
    }
  }

  cout << calc(me, you) << endl;
  
  return 0;
}