Why do I get an indentation error?

to_you ='''
Stranger, if you passing meet me and desire to speak to me, why
  should you not speak to me?
And why should I not speak to you?
p = "1"
  to_you += p

Im trying to execute the code above to include 1 in text but its showing indentationerror

The second last line is indented. Unindent that line and it will work.