import (
"fmt"
"strings"
)
var startString = "3, 2, 1, go!"
startString = strings.Replace(
startString, "1", "one", 1)
startString = strings.Replace(
startString, "2", "two", 1)
startString = strings.Replace(
startString, "3", "three", 1)
//startString = "three, two, one, go!"
//replace all
var oneString = "1 1 1"
oneString = strings.Replace(
oneString, "1", "one", -1)
//oneString is "one one one"
fmt.Println(startString)
fmt.Println(oneString)