#include<stdio.h>
#include<stdlib.h>

void run(void){
  int m;
  scanf("%d",&m);
  char odd[]="odd";
  char even[]="even";
  if(m%2==0){
    printf("%s\n",odd);
  } else if(m==1 || m==21){
    printf("%s\n",even);
  } else {
    printf("%s\n",even);
  }
  return;
}

int main(void){
  run();
  return 0;
}