Greek Letter

The text colors of each greek letter below changes by writing the collect spell of them.

Ι ι		Π π
Ψ ψ		Ο ο
Δ δ		Μ μ
Ζ ζ		Α α
Λ λ		Ρ ρ
Η η		Κ κ
Γ γ		Θ θ
Β β		Χ χ
Ν ν		Ξ ξ
Σ σ		Ε ε
Ω ω		Υ υ
Φ φ

https://en.wikipedia.org/wiki/Greek_alphabet
http://www.moj.go.jp/isa/applications/guide/tetuduki_index5.html