function daysAfterBirth([arg1]){
    let input = arg1;
    let inputArray = input.split('-');
    let monthOutput = 0;
    let dayOutput = 0;
    let month = 0;
    let day = 0;
    let newdate = 0;
    if (input[0].length<3){
    day = inputArray[0];
    month = inputArray[1];
    let year = inputArray[2];
    let birthdate = `${year}-${month}-${day}`
    newdate = new Date(birthdate);
    newdate.setDate((newdate.getDate())+1000);
    dayOutput = newdate.getDate();
    monthOutput = newdate.getMonth()+1;
    let yearOutput = newdate.getFullYear();
    newdate = (`${dayOutput}-${monthOutput}-${yearOutput}`);
    }else if (input[0].length==4){
    let year = inputArray[0];
    month = inputArray[1];
    day = inputArray[2];
    let birthdate = `${year}-${month}-${day}`
    newdate = new Date(birthdate);
    newdate.setDate((newdate.getDate())+1000);
    dayOutput = newdate.getDate();
    monthOutput = newdate.getMonth()+1;
    let yearOutput = newdate.getFullYear();
    }
    if (monthOutput<10){
        month ="0"+month;
    }if (dayOutput<10){
        day ="0"+day;
    }
    console.log(newdate)
}