Unique Characters Checker

Given a string, determine whether all characters in the string are unique. A string is said to have all unique characters if no character appears more than once. Mathematically, for a string S, the condition for uniqueness can be expressed as:

$$|S| = |\{c : c \in S\}|$$

The check is case-sensitive, meaning that uppercase and lowercase letters are considered different. Even an empty string should be considered as having all unique characters.

inputFormat

The input consists of a single line containing the string S. The string can contain letters, digits, symbols, or spaces.

outputFormat

Print True if all characters in the string are unique, otherwise print False.

hello

False