NB 2, spread 4 ... 2 ... Corinth:Notebook:2
Η'-4 ... Η'-4
Η-4 ... Η-4-2 ... Η-4-2
Κ-4 ... Κ-4-2 ... Κ-4-2
Ζ-4 ... Ζ-4-2 ... Ζ-4-2
Α-4 ... Α-4-2 ... Α-4-2
Δ-4 ... Δ-4
Ε-4 ... Ε-4