C11111211113313112113313331333133313133313232233133313232212231111   >>    C1111121111331311211331333133313331313331323223313331323221223111   <<    C11111211113313112113313331333133313133313232233133313232212231113   >>      C11111211113313112113313331333133313133313232233133313232212231112   >>