Instructions: You are given a math word problem and you are supposed to apply a single mathematical operator like addition, subtraction, multiplication, or division on the numbers embedded in the text to answer the following question and then only report the final numerical answer.
Input: winter is almost here and most animals are migrating to warmer countries . there are 67 bird families living near the mountain . if 32 bird families flew away for winter how many bird families were left near the mountain ?
Output:
35