#include "bits/stdc++.h" using namespace std; using ll = long long; const double pi = acos(-1); #define FOR(i,a,b) for (ll i=(a),__last_##i=(b);i<__last_##i;i++) #define RFOR(i,a,b) for (ll i=(b)-1,__last_##i=(a);i>=__last_##i;i--) #define REP(i,n) FOR(i,0,n) #define RREP(i,n) RFOR(i,0,n) #define __GET_MACRO3(_1, _2, _3, NAME, ...) NAME #define rep(...) __GET_MACRO3(__VA_ARGS__, FOR, REP)(__VA_ARGS__) #define rrep(...) __GET_MACRO3(__VA_ARGS__, RFOR, RREP)(__VA_ARGS__) template ostream& operator<<(ostream& os, const vector& v) { REP(i, v.size()) { if (i)os << " "; os << v[i]; }return os; } template ostream& operator<<(ostream& os, const vector>& v) { REP(i, v.size()) { if (i)os << endl; os << v[i]; }return os; } const ll INF = LLONG_MAX; ll MOD = 1000000007; ll _MOD = 1000000009; double EPS = 1e-10; #define int long long inline void my_io() { std::ios::sync_with_stdio(false); std::cin.tie(0); cout << fixed << setprecision(16); //cout << setprecision(10) << scientific << ans << endl; } signed main() { ll g, c, p; string s; cin >> g >> c >> p >> s; vector v(3, 0); REP(i, s.size()) { if (s[i] == 'G') { v[0]++; } else if (s[i] == 'C') { v[1]++; } else { v[2]++; } } ll ans = 0; ans += min(p, v[0]) * 3; p -= min(p, v[0]); v[0] -= min(p, v[0]); ans += min(g, v[1]) * 3; g -= min(g, v[1]); v[1] -= min(g, v[1]); ans += min(c, v[2]) * 3; c-= min(c, v[2]); v[2] -= min(c, v[2]); ans += min(g, v[0]); ans += min(c, v[1]); ans += min(p, v[2]); cout << ans << endl; }