Problem Statement
There is a shogi (Japanese chess) board with $H$ rows and $W$ columns, and one king piece. The square at the $i$-th row from the top and $j$-th column from the left of the board is represented as $(i, j)$.
Initially, the king is placed at $(A, B)$. You perform the following operation exactly $T$ times.
- Move the king to one of the eight adjacent squares of the current square. More precisely, if the king is at square
$(i, j)$, move the king to one of$(i+1,j+1), (i+1,j), (i+1,j-1), (i,j+1), (i,j-1), (i-1,j+1), (i-1,j), (i-1,j-1)$. The king cannot leave the board.
Find the number, modulo $998244353$, of operation sequences such that the king is at $(C, D)$ after completing all $T$ operations. Two operation sequences are considered different if and only if there exists an integer $i$ $(1 \leq i \leq T)$ such that the king's position after the $i$-th operation is different.
Constraints
$2 \leq H \leq 3 \times 10^5$$2 \leq W \leq 3 \times 10^5$$1 \leq T \leq 3 \times 10^5$$1 \leq A \leq H$$1 \leq B \leq W$$1 \leq C \leq H$$1 \leq D \leq W$- All input values are integers.
Input
The input is given from Standard Input in the following format:
H W T A B C D
Output
Output the number, modulo $998244353$, of operation sequences such that the king is at $(C, D)$ after completing all $T$ operations.
样例
3 4 3 2 1 3 4
5
202 123 456 20 25 7 20
167373259
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