Melody which Taruskin dates to "around 1100." Apparently the Franks liked "formal rounding and regularity" as he puts it. Figured I'd share it on the merits of a). that crazymule elision b). the melisma on the final kyrie eleison.
Melody's in the Liber usualis if Wikipedia can be believed.
As you'll hear, the text isn't terribly difficult: Kyrie eleison x 3, Christe eleison x 3, kyrie eleison x 3. Keep it simple stupid.