C11111333133313232233133313331333131133132313311211111211113322313232211   >>    C1111133313331323223313331333133313113313231331121111121111332231323221   <<    C11111333133313232233133313331333131133132313311211111211113322313232213   >>      C11111333133313232233133313331333131133132313311211111211113322313232212   >>