import re
tag_pattern = re.compile(r'<\s*(?!/|!)([A-Za-z][\w\-]*)',re.ASCII)

number_of_lines = int(input())
unique_tag_names = set()
for _ in range(number_of_lines):
    html_line = input()
    unique_tag_names.update(tag_pattern.findall(html_line))
    
print(";".join(sorted(unique_tag_names)))