The number $$789678567456$$ is added to the number $$987876765654$$.  Since we carry a $$1$$ when adding the left-most digits, the sum has $$12+1$$ digits. 
When the number $$789678567456$$ is added to the number $$987876765654$$, how many digits does the sum have? 
Options:
  $$12$$ 
  $$13$$ 
  $$24$$ 
  $$25$$ 