function alphabetPosition(text) {
    let a = text
    let g = 0
    let b = []
    var c = ""
    let t = 1

    for (let i = 0; i < a.length; i++) {
        b[i] = a[i]
    }


    for (let i = 0; i < a.length; i++) {

        g = a[i].charCodeAt(0)


        if ((g >= 65 && g <= 90) || (g >= 97 && g <= 122) ) {
            if(t!=1) c += " "
            t++
            if (g >= 65 && g <= 90) {
                c += g - 64

            }
            if (g >= 97 && g <= 122) {
                c += g - 96

            }

        }
    }

    return c;

}

console.log(alphabetPosition("The sunset sets at twelve o' clock."))