C11111333133313232233133313331333131123313221211113313113313112331313121   >>    C1111133313331323223313331333133313112331322121111331311331311233131312   <<    C11111333133313232233133313331333131123313221211113313113313112331313123   >>      C11111333133313232233133313331333131123313221211113313113313112331313122   >>