C31232233133313221211113313331311331333133313113313331333132313232211   >>    C3123223313331322121111331333131133133313331311331333133313231323221   <<    C31232233133313221211113313331311331333133313113313331333132313232213   >>      C31232233133313221211113313331311331333133313113313331333132313232212   >>