local ffi = require("ffi")
local C = ffi.C
ffi.cdef[[
long long atoll(const char*);
]]

local function lltonumber(str)
  return C.atoll(str)
end

local function getgcd(x, y)
  while 0LL < x do
    x, y = y % x, x
  end
  return y
end

s = io.read()
a, b = s:match("(%d+) (%d+)")
a = lltonumber(a)
b = lltonumber(b)
gcd = getgcd(a, b)
if 1000000000LL * 1000000000LL == gcd then
  print("Odd")
else
  local min = 1LL
  local max = 1000000000LL
  while 1LL < max - min do
    local mid = (min + max) / 2LL
    if mid * mid <= gcd then
      min = mid
    else
      max = mid
    end
  end
  if min * min == gcd then
    print("Odd")
  else
    print("Even")
  end
end