package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
	"strings"
)

func main() {
	reader := bufio.NewReader(os.Stdin)

	fmt.Print("Your current age: ")
	text, _ := reader.ReadString('\n')
	age, _ := strconv.Atoi(strings.TrimSpace(text))

	yearsLeft := 65 - age
	fmt.Printf("You have %d years until retirement.\n", yearsLeft)
}