C11111333133313232233133313331333132313331312111133132233323111   >>    C1111133313331323223313331333133313231333131211113313223332311   <<    C11111333133313232233133313331333132313331312111133132233323113   >>      C11111333133313232233133313331333132313331312111133132233323112   >>