def purify_even_sequence():
    try:
        n= int(input().strip())
        value=[]
        
        for _ i in range(n):
            v = input().strip()
            if not
            v.lstrip('-').isdigit():
                print("Invalid input")
                return
            values.append(int(v))
            
            evens = [str(x) for x in values if x %2 == 0]
            if evens:print(" ".join(evens))
            else:
                print("Empty")
            except:
                print("Invalid input")