function solve() {

  let text = document.getElementById('text').value;

  let nameConv = document.getElementById('naming-convention').value;

  if (nameConv === "Camel Case") {

    text = text.split(' ');

    text = text.map(el => el.toLowerCase());

    text = text.map(el => el.split(''));

    for (let i = 1; i < text.length; i++) {

      text[i][0] = text[i][0].toUpperCase();

    }

    text = text.flat();

    text = text.join('');

  } else if (nameConv === "Pascal Case") {

    text = text.split(' ');

    text = text.map(el => el.toLowerCase());

    text = text.map(el => el.split(''));

    for (let i = 0; i < text.length; i++) {

      text[i][0] = text[i][0].toUpperCase();

    }

    text = text.flat();

    text = text.join('');

  } else if (nameConv === "Another Case") {

    text = 'Error!';

  }

  let result = document.getElementById('result');

  result.textContent = text;

  console.log(text);


}