B33113313132313113313223313331323331323121123313233313223311231   >>    B3311331313231311331322331333132333132312112331323331322331123   <<    B33113313132313113313223313331323331323121123313233313223311233   >>      B33113313132313113313223313331323331323121123313233313223311232   >>