const input = ["a1b2", "c3d", "e5f6g", "xyz", "123", "a3"];

const processArray = (arr) => {
    const convert = ["one", "two", "three", "four","five","six","seven", "eaight", "nine"]
    arr.sort((a,b)=> {
        console.log(a,b)
        if(a.toLowerCase() < b.toLowerCase()){
            return -1
        }
        return 1
            })
    const result = []
    for(val of arr){
        let isNumber = false
        let str = ""
        for(char of val){
            if(!isNaN(char)){
                isNumber = true
                str = str + convert[+char - 1]
            }else{
                 str = str + char
            }
        }
        if(isNumber){
             result.push(str)
             isNumber = false
             str = ""
        }
    }
    return result

}

const result = processArray(input);
console.log(result); // Output: ["onetwothree", "three", "aonebtwo", "cthree", "efivegsix"]