Secret Code

Joana likes to play pretending to be a secret agent with her friends Bruna, Jaqueline and Laura. Joana and Bruna have created a secret code to communicate without their enemies discovering their plans. The secret code works as follows:

• The letter 'a' is represented by a single dot '.'
• The letter 'b' is represented by two dots '..'
• The letter 'c' is represented by three dots '...'
• The other letters follow the previous logic, however each set of points is separated by a space and always with a set of more points, as in the example below:

. → a
.. → b

... → c

. . → d

.. .. → e
... ... → f

. . . → g
.. .. .. → h
... ... ... → i

Your goal is to create a program that decipher the secret messages and help Jaqueline and Laura find out what Joana and Bruna are planning.