C11111333133313232233133313331333131123313221211113313113313231311212121   >>    C1111133313331323223313331333133313112331322121111331311331323131121212   <<    C11111333133313232233133313331333131123313221211113313113313231311212123   >>      C11111333133313232233133313331333131123313221211113313113313231311212122   >>