#include <vector>
#include <list>
#include <map>
#include <set>
#include <unordered_set>
#include <unordered_map>
#include <deque>
#include <stack>
#include <bitset>
#include <algorithm>
#include <functional>
#include <numeric>
#include <utility>
#include <sstream>
#include <queue>
#include <iostream>
#include <iomanip>
#include <cstdio>
#include <cmath>
#include <cstdlib>
#include <cctype>
#include <string>
#include <cstring>
#include <ctime>
#include <fstream>
#include <cstdio>
#include <climits>
#include <complex>
#include <cstdint>
#include <tuple>

#define M_PI       3.14159265358979323846

using namespace std;

//conversion
//------------------------------------------
inline int toInt(string s) { int v; istringstream sin(s); sin >> v; return v; }
template<class T> inline string toString(T x) { ostringstream sout; sout << x; return sout.str(); }
inline int readInt() { int x; scanf("%d", &x); return x; }

//typedef
//------------------------------------------
typedef vector<int> VI;
typedef vector<VI> VVI;
typedef vector<string> VS;
typedef pair<int, int> PII;
typedef pair<int, PII> TIII;
typedef long long LL;
typedef unsigned long long ULL;
typedef vector<LL> VLL;
typedef vector<VLL> VVLL;

//container util

//------------------------------------------
#define ALL(a)  (a).begin(),(a).end()
#define RALL(a) (a).rbegin(), (a).rend()
#define PB push_back
#define MP make_pair
#define SZ(a) int((a).size())
#define SQ(a) ((a)*(a))
#define EACH(i,c) for(typeof((c).begin()) i=(c).begin(); i!=(c).end(); ++i)
#define EXIST(s,e) ((s).find(e)!=(s).end())
#define SORT(c) sort((c).begin(),(c).end())

//repetition
//------------------------------------------
#define FOR(i,s,n) for(int i=s;i<(int)n;++i)
#define REP(i,n) FOR(i,0,n)
#define MOD 1000000007

#define rep(i, a, b) for(int i = a; i < (b); ++i)
#define trav(a, x) for(auto& a : x)
#define all(x) x.begin(), x.end()
#define sz(x) (int)(x).size()
struct Edge {
    int to, cost;
    Edge(int to, int cost): to(to), cost(cost) {}
};

typedef long long ll;
typedef pair<int, int> pii;
typedef vector<int> vi;
typedef vector<vector<Edge>> AdjList;
AdjList graph;

const int INF = 100000000;

LL N, M;

map<int, char> mp;

int main() {
    //cout << fixed << setprecision(15);
    int n;
    while(cin >> n){
        if(n == 0) break;
        vector<int> v;
        REP(i, n){
            int a = readInt();
            v.push_back(a);
        }

        string s; cin >> s;

        int cnt=0;
        for(int i=0; i<s.size(); ++i){
            int num = v[cnt%n];

            char c = s[i];
            int next;

            if(c>='A' && c<='Z'){
                next = (s[i]-'A')-num;
                if(next>=0){
                    s[i] = (char)(next+'A');
                }else{
                    int ababa=0;
                    while(next<0){
                        next += 26;
                        ababa++;
                    }
                    if(ababa%2==0) {
                        s[i] = (char) (next + 'A');
                    }else{
                        s[i] = (char) (next + 'a');
                    }
                }
            }else{
                next = s[i]-'a' -num;
                if(next>=0){
                    s[i] = (char)(next+'a');
                }else{
                    int ababa=0;
                    while(next<0){
                        next += 26;
                        ababa++;
                    }
                    if(ababa%2==0) {
                        s[i] = (char) (next + 'a');
                    }else{
                        s[i] = (char) (next + 'A');
                    }
                }
            }


            cnt++;
        }
        cout << s << endl;
    }
    return 0;
}


Measured memory_bytes: 3240