Extract First Two Characters

Background

This is a basic string processing problem designed to test your ability to determine string length and extract characters.

Problem Description

Given a string, return a string of length $2$ made of its first $2$ characters. If the string length is less than $2$, use '@' for the missing characters.

Input Format

Input is given from standard input in the following format.

A string.

Output Format

Output is printed to standard output in the following format.

A string of length $2$.

Sample

hello

"he"

hi

"hi"

h

"h@"

Sample Explanation

For the first sample "hello\