30

 
  1
×
×
  2 3 4 5 6 7 8
× ×
× × × ×
× × × ×
  9 10 11 12 13 14 15
× ×
× × × × ×
× × × × ×
  16 17 18 19 20 21 22
× ×
× × × ×
× × × × × ×
  23 24 25 26 27 28 29
× × × × ×
× × × × × ×
  30
×

30

 
  1 2 3 4 5 6
× ×
× × × × ×
× × × ×
  7 8 9 10 11 12 13
×
  × × ×
  × × ×
  14 15 16 17 18 19 20
× × × ×
× × × ×
× × × × × ×
  21 22 23 24 25 26 27
× × ×
× × × ×
× × × × × ×
  28 29 30 31
× × ×
× × ×
× × ×

30

 
  1 2 3
× ×
× ×
× ×
  4 5 6 7 8 9 10
× ×
× × × ×
× × × ×
  11 12 13 14 15 16 17
× × × ×
× × × × × ×
× × × × × ×
  18 19 20 21 22 23 24
× ×
× × × × ×
× × × × × ×
  25 26 27 28 29 30
× ×
× × ×
× × × ×

30

 
  1
×
×
  2 3 4 5 6 7 8
× ×
× ×
× × × ×
  9 10 11 12 13 14 15
×
× ×
× × ×
  16 17 18 19 20 21 22
× ×
× ×
× ×
  23 24 25 26 27 28 29
× × ×
× × × × × × ×
× × × × × × ×
  30 31
×
×
× ×

30

 
  1 2 3 4 5
× × × ×
× × × ×
× × × × ×
  6 7 8 9 10 11 12
× × × ×
× × × × × × ×
  13 14 15 16 17 18 19
×
×
  20 21 22 23 24 25 26
×
×
  27 28 29 30 31

30

 
  1 2
×
×
  3 4 5 6 7 8 9
× × ×
× × ×
× × ×
  10 11 12 13 14 15 16
× × ×
× × × × ×
× × × × ×
  17 18 19 20 21 22 23
×
× × ×
× × ×
  24 25 26 27 28 29 30
× × ×
× ×
× × × ×

30

 
  1 2 3 4 5 6 7
×
× × × ×
× × × ×
  8 9 10 11 12 13 14
× ×
× × ×
× × × ×
  15 16 17 18 19 20 21
× ×
× ×
× ×
  22 23 24 25 26 27 28
×
× ×
  29 30 31

30

 
  1 2 3 4
×
×
  5 6 7 8 9 10 11
×
  12 13 14 15 16 17 18
×
×
  19 20 21 22 23 24 25
× ×
× ×
  26 27 28 29 30

30

 
  1 2
× ×
× ×
  3 4 5 6 7 8 9
×
× ×
  10 11 12 13 14 15 16
×
×
  17 18 19 20 21 22 23
× ×
  24 25 26 27 28 29 30
× × ×
×
  31

30

 

 
  1 2 3 4 5 6 7
× ×
× × × ×
× ×
  8 9 10 11 12 13 14
×
× × ×
× × × ×
  15 16 17 18 19 20 21
× 
× ×
× ×
  22 23 24 25 26 27 28
× 
× ×
× × × × × ×
  29 30 31        
×
     
 
 

30

 

 
    1 2 3 4
× ×
× ×
× ×
  5 6 7 8 9 10 11
×
× ×
× ×
  12 13 14 15 16 17 18
× ×
× × × ×
× ×
  19 20 21 22 23 24 25
×
×
× × × × ×
  26 27 28
× ×  

303
 

 
    1 2 3 4
× ×
× ×
× ×
  5 6 7 8 9 10 11
×
× ×
× × × × ×
  12 13 14 15 16 17 18
× ×
× ×
× × × × × ×
  19 20 21 22 23 24 25
× × ×
× × × ×
× × × × × ×
  26 27 28 29 30 31
× × × × ×
× × × × × ×
× ×