How to print lines when user chooses to do so but they are printed consecutively?

Question

I am making a code in which there are a lot of lines to be printed (something like a story) but

they must be printed using different print commands.

Something like:

print("str1")
print("str2")
print("str3")    #and so on

I want that the user chooses when to print next line.

I tried this:

def next_line():
    while True:
    inp = input()
    if inp === "":
        break

print("str1")
next_line()
print("str2")
next_line()
print("str3")
next_line()   #and so on

But the problem with the above code is that it gives an output like:

str1

str2

str3

I don't want there to be blank lines between the printed lines.

That is, the output should be like:

str1
str2
str3

Is this possible to do? If so, how?