package main

import (

  "fmt"

  "strings"

)

func MyPrintf(a string) string {

	mm := strings.FieldsFunc(a,split)

    fmt.Println(mm)

    for i:=0;i<(len(mm));i++{

    	if len(mm[0])<len(mm[i]){

    	 mm[0]=mm[i]

    	}

    }

    kk :=mm[0]

    return kk

}

func split(s rune) bool{

		if ((s>='a'&&s<='z')||(s>='A'&&s<='Z')){

			return false

		}

		return true

	}

 func  main() {

 	var nn string

	nn = "fun&!! time"

     mm := MyPrintf(nn)

     fmt.Println(mm)

 }