void main()
{
  
  //odd r even
	var a= 4;
  if(a%2==0){
    print("even");
  }else{
    print("odd");
  }
  
  if(a>0){
    print("+ve");
  }else{
    print("-ve");
  }
    
  
  //sum of n natural num
  s(n){
    return (n*(n+1))/2;
  }
  s(a);
  print(s(a));
  
}