C11111211113313112113313331333133313133313232233131333131133121   >>    C1111121111331311211331333133313331313331323223313133313113312   <<    C11111211113313112113313331333133313133313232233131333131133123   >>      C11111211113313112113313331333133313133313232233131333131133122   >>