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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
κνέφας (τό)

gen. át. κνέφους, gen. tard. κνέφατος; dat. κνέφαϊ, contr. κνέφᾳ e κνέφεϊ
1   obscuridade; sombra
2   crepúsculo da tarde
3   crepúsculo da manhã; alba; aurora
4   trevas da noite.