package main

import "fmt"

func compressString(str string) string {
	return str
}

func removeDuplicate(str string) string {
	return str
}

func reverseAndDouble(str string) string {
	return str
}

func printCharacters(str string) string {
	return str
}

func main() {
	fmt.PrintLn(compressString("aaaabbccgh"))
	fmt.PrintLn(compressString("golang"))
	fmt.PrintLn(removeDuplicate("aabccchbbccaaa"))
	fmt.PrintLn(reverseAndDouble("abcdfgh"))
	fmt.PrintLn(printCharacters("golang"))
}
