B33113313132313113313223313331323331323121123313233313232212131   >>    B3311331313231311331322331333132333132312112331323331323221213   <<    B33113313132313113313223313331323331323121123313233313232212133   >>      B33113313132313113313223313331323331323121123313233313232212132   >>