Find characters in a string challenge in Go

findian.go

package main

import (
	"fmt"
	"log"
	"strings"
)

func main() {
	var userInput string

	fmt.Printf("Type in a string:\n")
	_, err := fmt.Scan(&userInput)

	userInput = strings.ToLower(userInput)

	if err != nil {
		fmt.Printf("%s\n", "An error has occured:")
		log.Fatal(err)
	}

	if string(userInput[0]) == "i" && string(userInput[len(userInput)-1]) == "n" && strings.Contains(userInput, "a") {
		fmt.Printf("%s", "Found!\n")
	} else {
		fmt.Printf("%s", "Not Found!\n")
	}
}