Remember that to say thank you in Greek, you say ευχαριστώ.
To say please in Greek is Παρακαλώ (Parakaló) - pah-dah-kah-loh.
And to say you're welcome, you say the same thing as please, Παρακαλώ (Parakaló) - pah-dah-kah-loh.
The letters for this new word are:
Π (pi) α (alpha) ρ (rho) α (alpha) κ (kappa) α (alpha) λ (lambda) ώ (omega)
(from: wikipedia - center for the greek language)
ASL: Please, You're Welcome
German: bitte, bitte schön
Spanish: Por favor, de nada
French: s'il vous plait, de rien