A E
This really depends on your coverage requirements, handover period, leave entitlement etc.
Classic is Early-Early-Late-Late-Night-Night sleep day after last night then 3 off or L-L-E-E. It's a 10 day pattern which does have flexibility.
This works fine, but there has to be an overtime coverage application for leave and a leave curfew as to numbers allowed off at the same time. Other factors need applications such as recurrent trng (if reqrd), fam flts etc.
Good luck