给定一个整数 $n$，如果一个序列的元素均来自 $[1, n]$，且其所有非空子序列（不一定连续）的和均不能被 $n$ 整除，则称该序列为“好”序列。
计算长度为 $n - k$ 的好序列的数量，结果对 $998\,244\,353$ 取模。
输入仅一行，包含两个整数 $n$ 和 $k$ ($1 \le k \le n/4 < n < 998\,244\,353$)。
输出一个整数，即问题的答案。
4 1
2
9 2
48
222222222 222222
851798824
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