function solve() {
    let optionList = document.querySelectorAll("#selectMenuTo")[0];
    let button = document.querySelector('button');
    let input = document.querySelector('#input');

    let optionBinary = document.createElement('option');
    optionBinary.textContent = 'Binary';
    let optionHexadecimal = document.createElement('option');
    optionHexadecimal.textContent = 'Hexadecimal';


    optionList.appendChild(optionBinary);
    optionList.appendChild(optionHexadecimal);

    let result = 0;
    if (optionList.textContent==="Binary"){
        console.log('Its binary');
    }else if(optionList.textContent==='Hexadecimal'){
        console.log('its hexade');
    }
}