C11111333133313232233133313331333131121133131133133313231211231   >>    C1111133313331323223313331333133313112113313113313331323121123   <<    C11111333133313232233133313331333131121133131133133313231211233   >>      C11111333133313232233133313331333131121133131133133313231211232   >>