exam06BarcodeGenerator

#include <iostream>
#include <string>
using namespace std;

int main()
{
    int beginNumber, endNumber;
    cin >> beginNumber >> endNumber;

    int beginThousands = beginNumber / 1000, endThousands = endNumber / 1000;
    int beginHundreds = (beginNumber / 100) % 10, endHundreds = (endNumber / 100) % 10;
    int beginTens = (beginNumber / 10) % 10, endTens = (endNumber / 10) % 10;
    int beginUnits = beginNumber % 10, endUnits = endNumber % 10;

    for (int i = beginThousands; i <= endThousands; i++) {
        for (int j = beginHundreds; j <= endHundreds; j++) {
            for (int k = beginTens; k <= endTens; k++) {
                for (int l = beginUnits; l <= endUnits; l++) {
                    if (i % 2 != 0 && j % 2 != 0 && k % 2 != 0 && l % 2 != 0) {
                        cout << i << j << k << l << " ";
                    }
                }
            }
        }
    }
    return 0;
}