Count Unique Normalized Names

You are given a list of guest names. Your task is to determine the number of unique names after normalizing them. The normalization process involves:

• Converting all letters to lowercase.
• Removing any leading and trailing spaces.

For example, the names "John Doe", "john doe", and " JOHN DOE " are all considered the same after normalization.

Note: Names that are entirely spaces are considered as an empty string and should be counted accordingly.

inputFormat

The first line of input contains a single integer n representing the number of names.

The following n lines each contain a single name (which may include spaces).

outputFormat

Output a single integer representing the number of unique normalized names.

5
John Doe
john doe
 Jane Doe 
jane doe
JOHN DOE

2