As happens very often, we make mistakes and Python raises errors. Read the following block of code and correct all the errors (there are many!). The final result should be Marie and Joseph have two children, Bert and An. Between the two children there is a difference of age of 3 years. In this exercise, use the concatenation method of creating complex strings, not the f-strings method.

child1 = 'Bert'
child2 = 'An'
age_child1 = '5'
age_child2 = '2'

mother = Marie
father = Joseph

message1 = mother 'and' father 'have two children, ' child1 and child2. 
message2 = 'Between the two children there is a difference of age of ' (age_child1 - age_child2) 'years.'
print(message1 + message2)

For this exercise, write the corrected version of the code in the fields below.