C11111333133313232233133313331333131133132313311211111213331333133313232213131   >>    C1111133313331323223313331333133313113313231331121111121333133313331323221313   <<    C11111333133313232233133313331333131133132313311211111213331333133313232213133   >>      C11111333133313232233133313331333131133132313311211111213331333133313232213132   >>