int dll[26];
int dllnum[26];
int prog[15];
char proname[15][100];


int main() {
    int a, b, c;
    int l = 0, t1, t2, t3;

    int cnt = 0;

    while (geti(t1), t1) {
        scanf("%d%d", &t2, &t3);
        for (int i = 0; i < t1; ++i) {
            geti(dll[i]);
            dllnum[i] = 0;
        }
        for (int i = 0; i < t2; ++i) {
            geti(prog[i]);
            scanf("%s", proname[i]);
        }

        int max = 0;
        int temp = 0;
        int j;
        for (int i = 0; i < t3; ++i) {
            geti(j);
            if (j > 0) {
                //prog
                temp += prog[j - 1];
                //dll
                for (int k = 0; k < strlen(proname[j - 1]); ++k) {
                    int pos=proname[j-1][k]-'A';
                    dllnum[pos]++;
                    if(dllnum[pos]==1){
                        temp+=dll[pos];
                    }
                }
            }
            else{
                j=-j;
                //prog
                temp -= prog[j - 1];
                //dll
                for (int k = 0; k < strlen(proname[j - 1]); ++k) {
                    int pos=proname[j-1][k]-'A';
                    dllnum[pos]--;
                    if(dllnum[pos]==0){
                        temp-=dll[pos];
                    }
                }
                
            }
            if(temp>max)
                max=temp;
        }
        printf("%d\n",max);

    }


    return 0;
}