import sequtils,strutils,sugar,algorithm,bitops,math

proc scanf*(formatstr: cstring){.header: "<stdio.h>", importc: "scanf", varargs.}
proc nextInt*(): int32 = scanf("%d", addr result)
proc nextLong*(): int64 = scanf("%lld", addr result)
proc nextFloat*(): float64 = scanf("%lf", addr result)
proc getchar*(): char {.header: "<stdio.h>", importc: "getchar".}
proc nextChar*(): char =
  while true:
    let c = getchar()
    if c.ord >= 0x21 and c.ord <= 0x7e:
      result = c
      break

proc nextStr*(): string =
  var ok = false
  while true:
    let c = getchar()
    if c.ord >= 0x21 and c.ord <= 0x7e: ok = true
    elif ok: break

    if ok:
      result.add(c)
      


const LOCAL {.booldefine.} = false

template `max=`*(x, y) = x = max(x, y)
template `min=`*(x, y) = x = min(x, y)
template times*(n: int; body: untyped): untyped = (for _ in 0 ..< n: body)
proc `<-`*[T, U](a: var T, b: U): var T =
  a = b
  return a

template `<<`(a: untyped, b: int): untyped = (a shl b)
template `>>`(a: untyped, b: int): untyped = (a shr b)


proc is_square(n: int64): bool =
  let x = n.float.sqrt.int64
  return x * x == n



let a = nextlong()
let b = nextlong()

let n = gcd(a, b)

if n.is_square:
  echo "Odd"
else:
  echo "Even"