package main

import (
    "bufio"
    "bytes"
    "fmt"
    "math/rand"
    "os"
    "strings"
    "time"
)

func main() {
    fmt.Println(`Cows and Bulls
Guess four digit number of unique digits in the range 1 to 9.
A correct digit but not in the correct place is a cow.
A correct digit in the correct place is a bull.`)