Unique Character Checker

In this problem, you are given a string and you need to determine whether all characters in the string are unique. If every character appears exactly once, print (Yes); otherwise, print (No).

The task is to check the uniqueness of characters in the string. This is a typical problem that tests your ability to work with strings and data structures like sets. Ensure that your solution takes input from standard input (stdin) and outputs the result to standard output (stdout).

inputFormat

The input consists of a single line containing a string (s). The string may contain letters, digits, and special characters. Read the input from stdin.

outputFormat

Output a single line: (Yes) if all characters in the string (s) are unique; otherwise, output (No). The output should be written to stdout.## sample

abcdefg

Yes