1. cells
   
   1. cells4x4
   2. cells5x5
   3. cells6x6
   4. cells8x8
   5. cells12x8
2. character_pairs
   
   1. character_pairs4x3
   2. character_pairs4x4
   3. character_pairs5x4
3. chess
   
   1. horse
      
      1. horse5x5
      2. horse6x6
      3. horse6x6faster
      4. horse8x8
   2. horse_and_king
      
      1. horse_and_king5x5
      2. horse_and_king6x6
      3. horse_and_king6x6faster
      4. horse_and_king8x8
   3. king
      
      1. king4x4
      2. king5x5
      3. king5x5faster
      4. king6x6faster
4. cubes
   
   1. cubes1
   2. cubes2
   3. cubes3
   4. cubes4
   5. cubes5
   6. cubes6
5. dictation_of_words
   
   1. dictation_of_words1
   2. dictation_of_words1_2
   3. dictation_of_words2
   4. dictation_of_words3
   5. dictation_of_words3_2
   6. dictation_of_words4
   7. dictation_of_words5
   8. dictation_of_words6
   9. dictation_of_words7
   10. dictation_of_words8
   11. dictation_of_words9
6. items_on_the_table
   
   1. items_on_the_table1
   2. items_on_the_table2
   3. items_on_the_table3
   4. items_on_the_table4
   5. items_on_the_table5
   6. items_on_the_table6
7. map
   
   1. map1
   2. map2
   3. map3
   4. map4
   5. map5
8. matches
   
   1. matches1
   2. matches2
   3. matches3
   4. matches4
   5. matches5
   6. matches6
   7. matches7
9. pairs_of_letters
   
   1. pairs_of_letters5x5
   2. pairs_of_letters5x6
   3. pairs_of_letters6x7
   4. pairs_of_letters6x8
   5. pairs_of_letters8x8
10. schulte
    
    1. schulte_5x5_with_light
    2. schulte_5x5_without_light
    3. schulte_7x7_with_light
    4. schulte_7x7_without_light
11. setting
    
    1. setting1
    2. setting2
    3. setting3
    4. setting4
    5. setting5
    6. setting6
    7. setting7
12. word_list
    
    1. word_list1
    2. word_list1_2
    3. word_list2
    4. word_list3
    5. word_list3_2
    6. word_list4
    7. word_list5
    8. word_list6
    9. word_list7
    10. word_list8
13. word_pairs
    
    1. word_pairs1
    2. word_pairs2
    3. word_pairs3
    4. word_pairs4
    5. word_pairs5