You are given a math word problem and you are supposed to apply addition or subtraction mathematical operators on the numbers embedded in the text to answer the following question and then only report the final numerical answer.

Let me give you an example: Last year , 90171 people were born in a country , and 16320 people immigrated to it . How many new people began living in the country last year ?
The answer to this example can be: 106491
Here is why: Total people living in the country = born - immigrated = 90171 - 16320 = 106491

OK. solve this:
Ethan has 31 presents . Alissa has 22 more than Ethan . How many presents does Alissa have ?
Answer:
53