A napisales ze czaisz to English please!

looking for a translation of this sentence: "a napisales ze czaisz" Online translators aren't helping with this one.... thanks!

and you wrote me that you understood.

czaić is a slang word for understand

Ja: czaję (*I* understand)
Ty: czaisz (*you*)
On/ona/ono: czai (*he/she/it*)

My: czaimy (*we*)
Wy: czaicie (*you* - plural)
Oni: czają (*they*)

Another slang word for 'understand' would be 'kumać'

Kumasz?
Kumasz czaczę? (= do you get this)

Ja: kumam (*I* understand)
Ty: kumasz (*you*)
On/ona/ono: kuma (*he/she/it*)

My: kumamy (*we*)
Wy: kumacie (*you* - plural)
Oni: kumają (*they*)