Sure you can do it, at the time of creating you can set the prefix or suffix to the sequence based on your preference.

Look at the below code, I have done the Prefix for my logic, you may refer the same do it for yours.

@api.model

def _generate_Sequence(self, vals):

    cr, context = self._cr, self._context

    refNo = ''

    sale_type = vals.get('sale_type', '')

    if sale_type == 'quote': refNo += 'CQ-'

    else: refNo += 'SO-'

    cr.execute(""" select id from sale_order where name ilike '""" + str(refNo) + """%'

        order by to_number(substr(name,(length('""" + str(refNo) + """')+1)),'9999999999')

        desc limit 1

        """)

    rec = cr.fetchone()

    if rec:

        case = self.sudo().browse(rec[0])

        auto_gen = case.name[len(refNo) : ]

        refNo = refNo + str(int(auto_gen) + 1).zfill(5)

    else:

        refNo = refNo + '00001'

return refNo