Among the bills numbered NO.150~NO.199, how many different selection methods are there to find 10 bills with consecutive numbers?
在编号NO.150～NO.199的票据中，想找出连号的10张票据，有多少种不同的选择方法．
<gadget id="calculator">190 - 150</gadget>
<output>40</output>

<gadget id="calculator">40 + 1</gadget>
<output>41</output>

<result>41</result>