C11111333133313232233133313331333131133132313331322132313112121   >>    C1111133313331323223313331333133313113313231333132213231311212   <<    C11111333133313232233133313331333131133132313331322132313112123   >>      C11111333133313232233133313331333131133132313331322132313112122   >>