1

function solve(input){
    let tour = input.shift();
    // console.log(tour);

    for(let i = 0; i < input.length;i++){
        let [ command, firstArg, secondArg] = input[i].split(':');
        // console.log(command);
        switch(command){
            case "Add Stop":
                    let index = Number(firstArg);
                    if(index >= 0 && index < tour.length){
                        let str = tour.substring(index);
                        let str1 = tour.replace(str, secondArg);
                        tour = `${str1}${str}`;
                    }
                console.log(tour);
                break;
            case "Remove Stop":
                let start = Number(firstArg);
                let end = Number(secondArg);
                let cut = '';
                if(start >= 0 && start < tour.length && end >= 0 && end < tour.length){
                   cut = tour.substring(start, end + 1);
                   tour = tour.replace(cut, '');
                }
                console.log(tour);
                break;
            case "Switch":
                    tour = tour.replace(firstArg, secondArg);
                console.log(tour);
                break;
            case "Travel":
                break;
        }
    }
    console.log(`Ready for world tour! Planned stops: ${tour}`)
}
solve([
    'Hawai::Cyprys-Greece',
    'Add Stop:7:Rome',
    'Remove Stop:11:16',
    'Switch:Hawai:Bulgaria',
    'Travel'
  ]
  );