Replace With Alphabet Position

function rt(str) {
    let num = []
    const alp = Array.from({length:26}, (v,n) => String.fromCharCode(n+97))
    
    // console.log(typeof(str))
    
    for (let arr of str) {
        // console.log(alp.includes(arr))
        // console.log(typeof(arr));
        
        if (alp.includes(arr)) {
            // console.log(typeof(arr))
            // console.log(this.arr)
            
            for (let arrw of arr) {
                let bol = alp.findIndex( rr => rr === arrw);
                num.push(bol)
            }
            
            
            
        }
    }
    return num.join("");
}

console.log(rt(' '))





// const ao = "abc"

// for (let ar of ao) {
//     console.log(ar)
// }