This is the 58th most frequent Spanish word.
con
"Con" means "with."
In this sentence, 'con' is used as a preposition to indicate accompaniment or being together with someone or something.
Voy a caminar con mi perro.
I am going to walk with my dog.
Here, 'con' functions as a preposition to denote association, linking the problem to its type of solution.
Es un problema con una solución complicada.
It is a problem with a complicated solution.
In this instance, 'con' is used to express the means or tools by which the action (drawing) is accomplished.