string

txt = 'avi, moshe, aharon, levi, itzik, keren, mor, MosHe, noy, david'
var x = txt.split(", ")

for (index = 0; index < x.length; index++) {
    if (x[index] == "keren") {
        x[index] = "liron"
    }
}


// show index from 1 to 4
//alert(x.slice(0, 4))

// print last index
alert(x.slice(-1))

// number of names in the list
alert(x.length)

//replace all 'moshe' in list to 'eli'

for (index = 0; index < x.length; index++) {
    if (x[index].toLowerCase() == "moshe") {
        x[index] = "eli"
    }
}
alert(x)