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Bob and Wilson are standing in line. Bob knows that there are $$5$$ people in front of him. Wilson knows that there is a total of $$12$$ people in the line. If Bob is just in front of Wilson, how many of the people in the line are behind Wilson? (Adapted from 2017 Math Kangaroo Problem, Level 1-2, Question \#14) 
Overseas Competition->Knowledge Point->Word Problem Modules
$$12-5-2=5$$ 