給定一個整數 $n$，若一個數列的元素皆來自 $[1, n]$，且其所有非空子序列（不一定連續）之和皆不能被 $n$ 整除，則稱該數列為「好的」。
請計算長度為 $n - k$ 的「好的」數列數量，並對 $998\,244\,353$ 取模。
輸入僅一行，包含兩個整數 $n$ 和 $k$ ($1 \le k \le n/4 < n < 998\,244\,353$)。
輸出一個數字，即問題的答案。
4 1
2
9 2
48
222222222 222222
851798824
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