/* -*- coding: utf-8 -*-
 *
 * 2415.cc:  No.2415 偶数判定!Nafmoくん - yukicoder
 */

#include<cstdio>
#include<cstring>
#include<algorithm>
 
using namespace std;

/* constant */

/* typedef */

/* global variables */

char sa[128], sb[128];

/* subroutines */

/* main */

int main() {
  scanf("%s%s", sa, sb);
  int la = strlen(sa), lb = strlen(sb);
  int a = sa[la - 1] - '0', b = sb[lb - 1] - '0';

  if (a & b) puts("Odd");
  else puts("Even");
  return 0;
}