Ermmm, why did you include "Τὸ Ïήμα" ?
"ΟυδÎν (το) αδÏνατον (εστί)" with the proper breathing marks and "hesti" in whichever position you like it best (same goes for the rest really ) should do right?
You really don't know how to put the emoticon? Well, : x without space between the marks... or before typing your message to click "send a message" on the left of the message field
Well, yes, Τὸ Ïήμα (thing) isn't needed indeed.
Τὸ οá½Î´Îν τὸ ἀδÏνατον á¼ÏƒÏ„ίν. - will be more simple..I guess.