items = ['first string', 'second string']
html_str = "<ul>\n"  # "\ n" is the character that marks the end of the line, it does
                     # the characters that are after it in html_str are on the next line

# write your code here
for item in items:
    html_str += '<li>{}</li>\n'.format(item)
    
html_str += '</ul>'

print(html_str)

#Write some code, including a for loop, that iterates over a 
#list of strings and creates a single string, html_str, which is an HTML list