C11111333133313232233133313331333131133132313331313233313231221   >>    C1111133313331323223313331333133313113313231333131323331323122   <<    C11111333133313232233133313331333131133132313331313233313231223   >>      C11111333133313232233133313331333131133132313331313233313231222   >>