Unique Character Checker

You are given a string and need to determine whether it contains only unique characters, ignoring case. In other words, the string should not have any character that appears more than once, even if the cases are different. For instance, the string "abcdef" should return True while "aAbBcC" should return False since 'a' and 'A' are considered the same.

The uniqueness check is case-insensitive, meaning that the letters 'A' and 'a' are treated as identical. This problem tests your ability to handle string manipulation, data structures, and case conversion effectively.

inputFormat

A single line containing the string to be checked. The string can consist of letters, digits, special characters, or may be empty.

outputFormat

Print either "True" if all characters in the input string are unique (ignoring case), or "False" otherwise.## sample

abcdef

True