Selecting between user-made levels

In my game, which is a variation of flashcards, the player can create their own flashcard sets and name them. To create the terms, I have an input field for the subject name and then two columns of input fields for the actual terms. I was thinking of creating different dictionaries for each subject the player makes (there can be up to 9 subjects/card sets), but how can I do this with the same input fields? Or I guess I should say...how can I save the terms and definitions with their respective subject name so that different subjects can be selected to play a new game? Here's what I have so far...sorry if this is really messy. BTW, the modal panel is a popup message that tells the user to delete a set since the maximum number of sets that can be stored is 9.

 using System.Collections;
 using System.Collections.Generic;
 using UnityEngine;
 using UnityEngine.UI;
 
 public class CreateSet : MonoBehaviour
 {
     public GameObject Subject1;
     public GameObject Subject2;
     public GameObject Subject3;
     public GameObject Subject4;
     public GameObject Subject5;
     public GameObject Subject6;
     public GameObject Subject7;
     public GameObject Subject8;
     public GameObject Subject9;
 
     public Text subject1;
     public Text subject2;
     public Text subject3;
     public Text subject4;
     public Text subject5;
     public Text subject6;
     public Text subject7;
     public Text subject8;
     public Text subject9;
 
     public InputField subjectName;
     public static Button ContinueButton;
     public GameObject modalPanel;
 
     public InputField term1;
     public InputField term2;
     public InputField term3;
     public InputField term4;
     public InputField term5;
     public InputField term6;
     public InputField term7;
     public InputField term8;
     public InputField term9;
     public InputField term10;
     public InputField term11;
     public InputField term12;
     public InputField term13;
     public InputField term14;
     public InputField term15;
 
     public InputField def1;
     public InputField def2;
     public InputField def3;
     public InputField def4;
     public InputField def5;
     public InputField def6;
     public InputField def7;
     public InputField def8;
     public InputField def9;
     public InputField def10;
     public InputField def11;
     public InputField def12;
     public InputField def13;
     public InputField def14;
     public InputField def15;
 
 
     public void SetName()
     {
         subject1.text = "1. " + subjectName.text;
         if (subject1.text != null)
         {
             subject2.text = "2. " + subjectName.text;
             if (subject2.text != null)
             {
                 subject3.text = "3. " + subjectName.text;
                 if (subject3.text != null)
                 {
                     subject4.text = "4. " + subjectName.text;
                     if (subject4.text != null)
                     {
                         subject5.text = "5. " + subjectName.text;
                         if (subject5.text != null)
                         {
                             subject6.text = "6. " + subjectName.text;
                             if (subject6.text != null)
                             {
                                 subject7.text = "7. " + subjectName.text;
                                 if (subject7.text != null)
                                 {
                                     subject8.text = "8. " + subjectName.text;
                                     if (subject8.text != null)
                                     {
                                         subject9.text = "9. " + subjectName.text;
                                         if (subject9.text != null)
                                         {
                                             modalPanel.SetActive(true);
                                         }
                                     }
                                 }
                             }
                         }
                     }
                 }
             }
         }
     }
 
     public Dictionary<string, string> termsDefs;
 
     private void Start ()
     {
         termsDefs = new Dictionary<string, string>();
 
         termsDefs.Add(term1.text, def1.text);
         termsDefs.Add(term2.text, def2.text);
         termsDefs.Add(term3.text, def3.text);
         termsDefs.Add(term4.text, def4.text);
         termsDefs.Add(term5.text, def5.text);
         termsDefs.Add(term6.text, def6.text);
         termsDefs.Add(term7.text, def7.text);
         termsDefs.Add(term8.text, def8.text);
         termsDefs.Add(term9.text, def9.text);
         termsDefs.Add(term10.text, def10.text);
         termsDefs.Add(term11.text, def11.text);
         termsDefs.Add(term12.text, def12.text);
         termsDefs.Add(term13.text, def13.text);
         termsDefs.Add(term14.text, def14.text);
         termsDefs.Add(term15.text, def15.text);
    
 
 
     }
 }