String Manipulator - Group 2

function solve(input){
    let string = input.shift();

    for(let i = 0; i < input.length; i++){
        let [ command, firstArg, secondArg] = input[i].split(' ');
        // console.log(command);
        switch(command){
            case "Change":
                index = Number(firstArg);
                for(let i = 0; i < string.length; i++){
                    string = string.replace(index, secondArg);
                }
                console.log(string);
                break;
            case "Includes":
                if(string.includes(firstArg)){
                    console.log('True');
                } else {
                    console.log('False');
                }
                break;
            case "End":
                if(string.endsWith(firstArg)){
                    console.log('True');
                } else {
                    console.log('False');
                }
                break;
            case "Uppercase":
                string = string.toUpperCase();
                console.log(string);
                break;
            case "FindIndex":
                let indexNeeded = string.indexOf(firstArg);
                console.log(indexNeeded);
                break;
            case "Cut":
                indexStart = Number(firstArg);
                length = Number(secondArg);
                let cut = string.substring(indexStart, indexStart + length)
                .split(' ')
                .join(' ');
                console.log(cut);
                break;
            case "Done":
                break;
        }
    }
}