local read = setmetatable({}, {__index = function(t, k) local a = {} for i=1,#k do table.insert(a, string.sub(k, i, i)) end local r = io.read local u = table.unpack return function() return r(u(a)) end end})
-- A
local a, _, s = read.nll()
if a >= 3200 then print(s)
else print("red") end