package mainimport (	"fmt"	"strings")func main() {	a := "大大1122佛挡杀佛大大"	c := Substr(a, "大大1", "杀")	fmt.Println(c)}func Substr(str, startStr, endStr string) string {	s := strings.Index(str, (startStr)) + len(startStr)	e := strings.Index(str, (endStr))	if s == -1 {		return ""	}	if e == -1 {		return string(str[s:])	}	return string(str[s+1:e])}

def substr(stringStr,start,end):    m=stringStr.index(start)    n=stringStr.index(end)    if m==-1 :        return""    if n==-1:       return stringStr(str[m:])    return stringStr[m+1:n]a= "大大1122佛挡杀佛大大"print(substr(a,"大大1","杀"))