First, we need to enter any combination of numbers in order to start password selection. I advise you to use the combination 0123 and subsequently select the numbers in order so as not to get confused in the numbers in the future.


Now let's analyze the screenshot from above. Gray numbers mean that they are completely missing from the password. Therefore, when further selecting a password, we no longer use these numbers and try the following ones.
If the number is colored yellow, it means that it is in the password, but at the moment it is not in its place.
Knowing this, we continue to select the password. I strongly recommend inserting the numbers in ascending order.

If the number lights up in blue, then this number is in its place in the password, so then we enter them without changing their place in the password.
We also found a new suitable number, but as we see its place in the password is incorrect, so we rearrange the six to an "free" place.

Now we have to choose only the last digit for the password. Considering that we have gone through all the numbers from 0 to 7, then either 8 or 9 remains the last one. In our case, it's 8.


And now I will make an extremely important clarification. There are never two or more identical digits in a password, so it makes no sense to try combinations like 0000. A password can have only one 0, only one 1, and so on.