Filter and Sort Colors

You are given a list of color names (strings) that may include empty strings. Your task is to process this list by performing the following operations:

• Filter out any empty strings.
• Remove duplicate color names.
• Sort the remaining color names in alphabetical order.

If, after filtering, there are no valid color names, you should output a single string: no colors.

Input Format: The first line contains an integer \(n\) denoting the number of color entries. The following \(n\) lines each contain a color name. Note that a line may be empty.

Output Format: If there are valid colors, print them on a single line, separated by a single space, in alphabetical order. Otherwise, print no colors.

inputFormat

The first line of input contains an integer \(n\), the number of color strings. Each of the next \(n\) lines contains one color string. A color string may be empty.

outputFormat

If there is at least one non-empty color, output the unique colors sorted in alphabetical order on a single line separated by spaces. Otherwise, output no colors.

6
red
blue
red

green
blue

blue green red