C11111211113313112113313331333133313113313232321333131133232233131   >>    C1111121111331311211331333133313331311331323232133313113323223313   <<    C11111211113313112113313331333133313113313232321333131133232233133   >>      C11111211113313112113313331333133313113313232321333131133232233132   >>