func LastIndexAny(s, chars string) int
package main
import (
"fmt"
"strings"
)
func main() {
fmt.Println(strings.LastIndexAny("go gopher", "go")) //4
fmt.Println(strings.LastIndexAny("go gopher", "rodent")) //8
fmt.Println(strings.LastIndexAny("go gopher", "fail")) //-1
}