B33113313132313113313223313331323133313223313231333132332113313113313231212121   >>    B3311331313231311331322331333132313331322331323133313233211331311331323121212   <<    B33113313132313113313223313331323133313223313231333132332113313113313231212123   >>      B33113313132313113313223313331323133313223313231333132332113313113313231212122   >>