package main

import (
	"fmt"
	"io/ioutil"
)

func main() {
	input, rErr := ioutil.ReadFile("input.txt")
	if rErr != nil {
		fmt.Println(rErr)
	}

  defer input.close()

  output, wErr := os.Create("output.txt")
    if wErr != nil {
      fmt.Println(wErr)
    }

    defer output.Close()
}