排列 - 题目

#4851. 排列

统计

AI Translation — This statement was translated using AI and may contain inaccuracies. Please refer to the original statement if in doubt.

有多少种单词 $A$ 的不同排列包含单词 $B$？请输出该数量除以 $10007$ 的余数。

输入格式

第一行包含一个由小写英文字母组成的字符串，即单词 $A$。字符串长度不超过 $500$。第二行包含一个由小写英文字母组成的字符串，即单词 $B$。单词 $B$ 的长度不会超过单词 $A$。

输出格式

在第一行输出所求排列数量除以 $10007$ 的余数。

样例

输入 1

mirko
mir

输出 1

说明 1

包含单词 $mir$ 的六种排列为：$kmiro, komir, mirko, mirok, okmir$ 和 $omirk$。

输入 2

sssss
ss

输出 2

输入 3

barbarabarbara
barbabarba

输出 3

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