function worldTour(input){
    let string=input.shift();
    for(let line of input){
        if(line==="Travel"){
            break;
        }
        let [command,valueOne,valueTwo]=line.split(":");
        switch(command){
            case "Add Stop":
                let index=Number(valueOne);
                let toInsert=valueTwo;

                if(index>=0 && index<string.length){
                    let firstPart=string.substring(0,index);
                    let secondPart=string.substring(index);
                    string=firstPart+toInsert+secondPart;
                    console.log(string)

                }
                break;
            case "Remove Stop":
                let startInd=Number(valueOne);
                let endInd=Number(valueTwo);
                if(startInd>=0 && endInd>=startInd && endInd<string.length){
                    let firstPart=string.substring(0,startInd);
                    let secondPart=string.substring(endInd+1);
                    string=firstPart+secondPart;
                    console.log(string)

                }
                break;
            case "Switch":
                let old=valueOne;
                let newStr=valueTwo;
                while(string.includes(old)){
                    string=string.replace(old,newStr);
                }
                console.log(string)
                break;
        }
    }
    console.log(`Ready for world tour! Planned stops: ${string}`)

}