import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        Scanner koko = new Scanner(System.in);
        int gi = koko.nextInt();
        int ci = koko.nextInt();
        int pi = koko.nextInt();
        int gy = 0;
        int cy = 0;
        int py = 0;
        String s = koko.next();
        for(int i=0; i<s.length(); i++){
            if(s.charAt(i)=='G'){
                gy++;
            }else if(s.charAt(i)=='C'){
                cy++;
            }else{
                py++;
            }
        }
        int gp=0; 
        int cp=0;
        int pp=0; 
        int gr=0; 
        int cr=0; 
        int pr=0; 
        int rp=0;
        if(pi>=gy){
            pp=3*gy;
            pr=pi-gy;
            if(ci>=py){
                cp=3*py;
                cr=ci-py;
                gp=3*gi;
                rp=cr;
            }else if(ci<py){
                cp=3*ci;
                if(pr>=(py-ci)){
                    rp=(py-ci);
                    gp=3*gi;
                }else if(pr<(py-ci)){
                    rp=pr;
                    gp=3*gy;
                }
            }
        }else if(pi<gy){
            pp=3*pi;
            if(gi>=cy){
                gp=3*cy;
                gr=gi-cy;
                if(gr>=(gy-pi)){
                    rp=gy-pi;
                    cp=3*py;
                }else if(gr<(gy-pi)){
                    rp=gr;
                    cp=3*py;
                }
            }else if(gi<cy){
                gp=3*gi;
                cp=3*py;
                rp=cy-gi;
            }
        }
        System.out.println(gp+cp+pp+rp);
    }
}