Three button combination to open next scene

I have a heck of a problem. I have thirty (30) buttons in a proposed trivia game, they are laid out in the following configuration - top row (A,B,C,D,E,F,G,H,I,J, ) second row (0,1,2,3,4,5,6,7,8,9, and a third row which are numbered (00,01,02,03,04,05,06,07,08,09). Using these combinations of buttons and clicking one and only one from each row I have a thousand (1000) - three (3) button combinations. E.g.: A27 would be one combination of the thousand possibilities. These are not random combinations each opens a very specific scene.
What I am trying to do is create a C# script that when I click any of these three (3) button combinations it will open a new scene. Once that scene is open I’m okay because then have my own scripts attached to the single buttons in the new scene to continue to a further scene.
What I can’t figure out is the syntax, should I use “if Statements such as - if (Btn_A) && (Btn_1) && (Btn_01) then load scene such and such? Then do I attach the script to the canvas then to each of the three button combinations (A 1000 Scripts combinations)? I have been trying to figure this out for two months (It’s Driving Me Nuts).

Hellllllllppppp!!!

This is dependent on how you order your levels. You may need to change this around a bit on your own depending on how you want your levels loaded, but you can assign a value from 0 to 9 for each of the three rows, but do it as a string and not a number. So instead of 1 or 4, it would be “1” or “4”. Then you can just add the strings together and convert it to an int.

For this example, I just put everything in Start(), but you would probably want to assign each variable on a button click and check in Update() if they are null or not. Once all three are assigned you can go ahead and create your levelID and load the next scene.

	private string s1;
	private string s2;
	private string s3;

	void Start () {    
		s1 = "3";  //This would be where you assign the value from your button click of row 1.
		s2 = "0";  //This would be where you assign the value from your button click of row 2.
		s3 = "5";  //This would be where you assign the value from your button click of row 3.

		string final = s1 + s2 + s3;
		int levelID = int.Parse (final);

		SceneManager.LoadScene (levelID);
	}

Thank you @Smnerat, I will try this and let you know if it works for me.