PROBLEM DESCRIPTION: Write a program to implement the following requirement:

The program will read from standard input which has two lines of text:

$-$ a string str$1$ on the first line of stdin $($this string may be an empty string$)$

$-$ a string str$2$ on the second line of stdin $($this string may be an empty string$)$

The maximum length of each input string is $100$ characters.

The program will output the longer string. If they both have equal length, print the first string. In

the case both input strings are empty, print nothing.

You can only use getchar$(),$ putchar$(),$ and printf$()$ functions to work with stdin and stdout.