C11111211113313112113313331333133313133313232233132233131133131121132221   >>    C1111121111331311211331333133313331313331323223313223313113313112113222   <<    C11111211113313112113313331333133313133313232233132233131133131121132223   >>      C11111211113313112113313331333133313133313232233132233131133131121132222   >>