26581번 - Repeat 다국어

Your teacher has been marking students off on their essays for repeating words and phrases when they could be exploring new syntax and using a thesaurus to spice up their writing. In order to save yourself from being called out for using repeats, you decide to create a way to check your essay for repeated substrings and find the longest one to fix. Write a program that, given a string of characters, finds the greatest repeated substring with no overlapping characters.

The first line will contain a single integer n that indicates the number of data sets that follow. Each data set will consist of one line with a string of letters of unknown length.

Output the integer length of the longest repeated substring, a space, and then the repeated string. If there are multiple with the same length, print out the first one to appear in the string.