C11111333133313232233133313331333131133132313311211113313112231121   >>    C1111133313331323223313331333133313113313231331121111331311223112   <<    C11111333133313232233133313331333131133132313311211113313112231123   >>      C11111333133313232233133313331333131133132313311211113313112231122   >>