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! Type in unicode polytonic Greek using beta code as indicated below:
/a => ά \a => ὰ =a => ᾶ )a => ἀ
(a => ἁ !a => ᾳ +i => ϊ h => η
q => θ x => χ c => ξ z = ζ
j => ψ w => ω s => σ, ς  
Combine punctuation marks when necessary e.g. )/a => ἄ
τέταρτος, η, ον

num. ord.
1   quarto

♦ τό τέταρτον adv.
2   pela quarta vez

♦ ἡ τετάρτη
3   quarto ou quarta; quartilho, medida para líquidos
4   quarto dia

♦ τὸ τέταρτον
5   quarta parte; quarto. 〈τέσσαρες〉