There is a column of numbers, the first number is 1, the second number is 3, starting from the third number, each number is the unit digit of the sum of the previous two numbers: 1, 3, 4, 7, 1, 8, 9, 7, 6, ..., in this column of numbers, take 2006 consecutive numbers, so that the sum of these 2006 numbers is the largest, then what is the largest sum.
有一列数，第一个数是1，第二个数是3，从第三个数开始，每个数都是其前面两个数的和的个位数：1，3，4，7，1，8，9，7，6，…，在这列数中，取连续2006个，使得这2006个数的和最大，那么这个最大的和是多少．
<gadget id="calculator">60 * 167</gadget>
<output>10_020</output>

<gadget id="calculator">10_020 + 8 + 9</gadget>
<output>10_037</output>

<result>10_037</result>