Take a look at the following code snippet:
>>> e = 'e'
>>> longer_string = 'This is a long string compared to the one below '
>>> c = 15
>>> shorter_string = "and I'm a shorter string"
>>> b = 11 + '7'
>>> print(longer_string + shorter_string)
???
>>> print(b + c)
???If the code was completely correct, the program would print a string for concatenation longer_string + shorter_string and an integer for summing b + c. However, a TypeError occurs when running the program. Can you figure out why it happens? Among the first five lines of the code, find the line that causes this error. Fix it in order to get the proper result. Write only the corrected line in the text field below, without '>>>'.