畀定一個整數 $n$。如果一個序列嘅元素都喺 $[1,n]$ 入面，而且佢所有非空子序列（唔一定連續）嘅元素總和都唔可以畀 $n$ 整除，就稱呢個序列為好序列。
計出長度為 $n-k$ 嘅好序列數目，對 $998\,244\,353$ 取模。
輸入只有一行，包含兩個整數 $n,k$（$1 \le k \le n/4<n<998\,244\,353$）。
輸出一個數——本題嘅答案。
4 1
2
9 2
48
222222222 222222
851798824
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