#include <iostream>
#include <vector>
#include <algorithm>
using namespace std;
using i32 = int32_t;
using u32 = uint32_t;
using i64 = int64_t;
using u64 = uint64_t;
#define rep(i,n) for(int i=0; i<(n); i++)



string ALPHABET = "ABCDEFGHIJKLMNOPQRSTUVWXYZ";
i64 C[26];
i64 K[26];
int N;
vector<string> S;
vector<int> A;
vector<int> B;
vector<i64> E;


i64 G[64][16][16];
i64 ans[16];


int main() {
    rep(i,26){ cin >> C[i]; C[i]--; }
    rep(i,26) cin >> K[i];
    cin >> N;
    S.resize(N);
    A.resize(N);
    B.resize(N);
    E.resize(N);
    rep(i,N){ cin >> S[i] >> A[i] >> B[i] >> E[i]; A[i]--; B[i]--; }

    const i64 INF = 1001001001001001001;

    rep(a,16) ans[a] = 0;

    rep(i,26){
        rep(d,64) rep(a,16) rep(b,16) G[d][a][b] = -INF;
        rep(d,64) rep(a,16) G[d][a][a] = 0;
        rep(n,N) if(S[n].find(ALPHABET[i]) != string::npos){
            int a = A[n], b = B[n];
            G[0][a][b] = max(G[0][a][b], E[n]);
            G[0][b][a] = max(G[0][b][a], E[n]);
        }
        rep(d,63) rep(a,16) rep(b,16) rep(c,16) G[d+1][a][c] = max(G[d+1][a][c], G[d][a][b] + G[d][b][c]);
        //rep(a,16){ rep(b,16) cout << G[0][a][b] << " "; cout << endl; } cout << endl;
        i64 vec[16];
        rep(a,16) vec[a] = -INF;
        vec[C[i]] = 0;
        for(int d=30; d>=0; d--) if(1 & (K[i] >> d)){
            //cout << "d = " << d << endl;
            i64 vecbuf[16];
            rep(a,16) vecbuf[a] = vec[a];
            rep(a,16) rep(b,16) vecbuf[b] = max(vecbuf[b], vec[a] + G[d][a][b]);
            rep(a,16) vec[a] = vecbuf[a];
        }
        //for(auto a : vec) cout << a << " "; cout << endl;
        rep(a,16){
            ans[a] += vec[a];
            ans[a] = max(ans[a], -INF);
        }
    }

    i64 finalans = -INF;
    rep(a,16) finalans = max(finalans, ans[a]);
    if(-INF / 10 < finalans) cout << finalans << endl;
    else cout << "Impossible" << endl;
    return 0;
}


struct ios_do_not_sync{
    ios_do_not_sync(){
        ios::sync_with_stdio(false);
        cin.tie(nullptr);
    }
} ios_do_not_sync_instance;