Long words X91958

Write a program that checks whether a given text reaches a goal number of words of at least a given goal length. The program reads first the goal number n and the goal length m; they are integers coming in the first line. Then finds out whether the text that follows them contains at least n different words of length at least m. If so, it outputs the n words, sorted according to the standard string ordering, each in a line. Otherwise, it prints Goal not attained.

Input

Input consists of two numbers n and m, being respectively the goal number and the goal length, followed by a sequence of words. Numbers n and m are integers, n is greater than zero and m is non negative.

Output

In case the goal is achieved, the output consists of n lines with the n first different words in the input text whose length is at least m. Words are shown according to the standard string order, one by line. When goal is not reached, a line with the message Goal not attained