first_name = 'heejun'
last_name = 'lim'

print('Hello, ' + first_name + ' ' + last_name.capitalize())
print('Hello, {} {}'.format(first_name, last_name))
print('Hello, {0} {1}'.format(first_name, last_name))
print('Hello, {1} {0}'.format(first_name, last_name))

print(f'Hello, {first_name} {last_name.capitalize()}')