Cron, unusual time set

What I need.

I need to run cron like this.

8,18,28,38,48,58 8-21 * * * script 

Everyday from 8 to 22 by 10 minutes at 8 minutes started, but without first launch, 8:08?

Is any elegant solution for this, or I need use 2 cron tasks for this?

Thanks.