#include <iostream>
#include <fstream>
#include <cstdlib>
using namespace std;

int main()
{
    ifstream fin("problem8data.txt");
    if (!fin)
    {
        cout << "Can't open problem8data.txt\n";
        exit(1);
    }
    int temp;
    int position = 0;
    int ascii_code;
    while (fin >> temp)
    {
        ascii_code = temp - position;
        // cout << temp << ' ' << position << ' '
        //      << ascii_code << ' ' << static_cast<char>(ascii_code) <<endl;
        cout << static_cast<char>(ascii_code);
        position++;
    }
}