Use the ten numbers 0, 1, 2, 3, 4, 5, 6, 7, 8, 9 to form two five-digit numbers, each number is only allowed once, so the difference between the two five-digit numbers is the smallest possible how many.
用0、1、2、3、4、5、6、7、8、9这十个数字组成两个五位数，每个数字只许用一次，这样两个五位数的差的最小可能是多少．
<gadget id="calculator">50_123 - 49_876</gadget>
<output>247</output>

<result>247</result>