该博客介绍了杭电1857题目的详细规则，即在一个字母网格中寻找隐藏的单词。题目提供了矩形网格的行数和列数，以及一组单词，要求找到每个单词在网格中的起始位置。输出应包含每个单词的起始行和列的0索引坐标，若找不到则返回-1 -1。示例输入和输出展示了具体操作方式。
Problem Description
Did you heard of a little game named "Word Puzzle" ? If you didn't, what a pity !
In the game, you will be given a rectangular grid of letters, in which several words are hidden. Each word may begin anywhere in the puzzle, and may be oriented in any straight line horizontally, vertically, or diagonally. However, the words must all go down, right, or down-right. A dictionary is also given to you, indicating the words to be found in the grid.
You task is to find the locations of each word within the grid.
Input
There is only one test case.
The first line is two integers R and C separated by
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