You are given an m x n matrix grid consisting of characters and a string pattern.
A horizontal substring is a contiguous sequence of characters read from left to right. If the end of a row is reached before the substring is complete, it wraps to the first column of the next row and continues as needed. You do not wrap from the bottom row back to the top.
\n\nA vertical substring is a contiguous sequence of characters read from top to bottom. If the bottom of a column is reached before the substring is complete, it wraps to the first row of the next column and continues as needed. You do not wrap from the last column back to the first.
\n\nCount the number of cells in the matrix that satisfy the following condition:
\n\npattern.Return the count of these cells.
\n\n\n
Example 1:
\n![\"\"](\"https://assets.leetcode.com/uploads/2025/03/03/gridtwosubstringsdrawio.png\")
\nInput: grid = [["a","a","c","c"],["b","b","b","c"],["a","a","b","a"],["c","a","a","c"],["a","a","b","a"]], pattern = "abaca"
\n\nOutput: 1
\n\nExplanation:
\n\nThe pattern "abaca" appears once as a horizontal substring (colored blue) and once as a vertical substring (colored red), intersecting at one cell (colored purple).
Example 2:
\n![\"\"](\"https://assets.leetcode.com/uploads/2025/03/03/gridexample2fixeddrawio.png\")
\nInput: grid = [["c","a","a","a"],["a","a","b","a"],["b","b","a","a"],["a","a","b","a"]], pattern = "aba"
\n\nOutput: 4
\n\nExplanation:
\n\nThe cells colored above are all part of at least one horizontal and one vertical substring matching the pattern "aba".
Example 3:
\n\nInput: grid = [["a"]], pattern = "a"
\n\nOutput: 1
\n\n
Constraints:
\n\nm == grid.lengthn == grid[i].length1 <= m, n <= 10001 <= m * n <= 1051 <= pattern.length <= m * ngrid and pattern consist of only lowercase English letters.给你一个由字符组成的 m x n 矩阵 grid 和一个字符串 pattern。
水平子串 是从左到右的一段连续字符序列。如果子串到达了某行的末尾，它将换行并从下一行的第一个字符继续。不会 从最后一行回到第一行。
\n\n垂直子串 是从上到下的一段连续字符序列。如果子串到达了某列的底部，它将换列并从下一列的第一个字符继续。不会 从最后一列回到第一列。
\n\n请统计矩阵中满足以下条件的单元格数量：
\n\npattern 的水平子串，且属于 至少 一个等于 pattern 的垂直子串。返回满足条件的单元格数量。
\n\n\n\n
示例 1：
\n![\"\"](\"https://pic.leetcode.cn/1745660164-PjoTAy-gridtwosubstringsdrawio.png\")
\n输入： grid = [[\"a\",\"a\",\"c\",\"c\"],[\"b\",\"b\",\"b\",\"c\"],[\"a\",\"a\",\"b\",\"a\"],[\"c\",\"a\",\"a\",\"c\"],[\"a\",\"a\",\"b\",\"a\"]], pattern = \"abaca\"
\n\n输出： 1
\n\n解释：
\n\n\"abaca\" 作为一个水平子串（蓝色）和一个垂直子串（红色）各出现一次，并在一个单元格（紫色）处相交。
示例 2：
\n![\"\"](\"https://pic.leetcode.cn/1745660201-bMoajW-gridexample2fixeddrawio.png\")
\n输入： grid = [[\"c\",\"a\",\"a\",\"a\"],[\"a\",\"a\",\"b\",\"a\"],[\"b\",\"b\",\"a\",\"a\"],[\"a\",\"a\",\"b\",\"a\"]], pattern = \"aba\"
\n\n输出： 4
\n\n解释：
\n\n上述被标记的单元格都同时属于至少一个 \"aba\" 的水平和垂直子串。
示例 3：
\n\n输入： grid = [[\"a\"]], pattern = \"a\"
\n\n输出： 1
\n\n\n
提示：
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