Command-line arguments and flags

Emma has been working on a small program (main.go) that takes only one argument — a lowercase word — and checks if it's a palindrome word or not:

package main

import (
    "fmt"
    "log"
    "os"
)

func main() {
    if len(os.Args) != 2 {
        log.Fatal("Error! Expected 1 argument only")
    }

    word := os.Args[1]

    for i := 0; i < len(word) / 2; i++ {
        if word[i] != word[len(word) - i - 1] {
            fmt.Printf("%s is not a palindrome! ❌", word)
            return
        }
    }
    fmt.Printf("%s is a palindrome! ✅", word)
}

Please enter the correct way to execute Emma's program from the command line below, using the word kayak as an argument. Remember that the name of the program is main!