#include <iostream>

using namespace std;

int main() {
    int T;
    bool line = false;
    while (cin >> T) {
        if (line) {
            line = true;
            cout << endl;
        }
        for (int i = 0; i < T; i++) {
            int intKey = 0;
            cin >> intKey;
            cout << char(intKey);
        }
    }
    return 0;
}