help with algorithm and data structure problem

I need help for solving this task. Inside file you find the task.txt and description for task.

I need to store bunch of words inside a effectiv structure. At the same time there is a 2D array that is made of charachters.
i need to find the words that have to property. that word from structure can be created by connecting those characters in
another file. so i have two file , one with word and one with 2D array of characters. the only rule for creating charchter
is that it goes to left, rightm up and down. not diagonal


thats it, and all of this is better explained in the file "task.txt" with examples. Language has to be java and i
need some of description so i can learn from it. i can pay more if you are realy good at explaning and using algorithme.