Translation of "Tails" in Arabic

Then the probability that it comes up four times tails

ثم من المحتمل بأن تأتي أربع مرات علامة الذيل

- I can't make heads or tails of what you say.
- I can't make head or tail of what you say.
- I can't understand what you're saying.

- لا أستطيع فهم ما تقول.
- لا أفهم ما تقوله.