A8031. Autocomplete

Autocomplete is a program function that enables inputting the text (in editors, command line shells, browsers etc.) completing the text by its inputted part. Vasya is busy working on a new browser called 'BERowser'. He happens to be working on the autocomplete function in the address line at this very moment. A list consisting of $n$ last visited by the user pages and the inputted part $s$ are known. Your task is to complete $s$ to make it an address of one of the pages from the list. You have to find the lexicographically smallest address having a prefix $s$ .

The first line contains the $s$ line which is the inputted part. The second line contains an integer $n$ ( $1<=n<=100$ ) which is the number of visited pages. Then follow $n$ lines which are the visited pages, one on each line. All the lines have lengths of from $1$ to $100$ symbols inclusively and consist of lowercase Latin letters only.

If $s$ is not the beginning of any of $n$ addresses of the visited pages, print $s$ . Otherwise, print the lexicographically minimal address of one of the visited pages starting from $s$ .

The lexicographical order is the order of words in a dictionary. The lexicographical comparison of lines is realized by the '<' operator in the modern programming languages.