If 5<x<8<y<13, then what is the greatest possible positive integer difference of x and y?  Choose the correct option.
A) 3	B) 4	C) 5	D) 6	E) 7
Let x=5.1 and y=12.1   Greatest possible difference=12.1-5.1= 
<gadget id="calculator">12.1-5.1</gadget>
<output>7</output>
7   Answer 7
<result>E</result>
If 5<x<8<y<13, then what is the greatest possible positive integer difference of x and y?