# input a sequence of integer numbers separated by a space and convert to a list

def get_integer_list():
    while True:
        # get the sequence string and strip off any trailing space (easy mistake)
        str1 = raw_input("Enter a sequence of integers separated by a space: ").rstrip()
        try:
            # create a list of integers from the string using list comprehension
            return [int(num) for num in str1.split(" ")]
        except ValueError:
            print "Error: '%s' is not an integer! Try again." % num
            
print get_integer_list()