Greek Alphabetical letters

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Across
  1. 4. oo-psi-lon
  2. 5. row
  3. 8. sig-ma
  4. 10. be-ta
  5. 12. Η
  6. 13. Θ
  7. 14. al-fa
  8. 15. ep-si-lon
Down
  1. 1. ta-oo
  2. 2. pa-yee
  3. 3. ψ
  4. 6. ω
  5. 7. ga-ma
  6. 9. del-ta
  7. 11. Ζ