06. Format the text

function solve() {
    let text = document.getElementById('input').value;
    let sentences = text.split('.').filter(s => s.trim() !== '');
    let result = [];

    for (let i = 0; i < sentences.length; i += 3) {
        let paragraphSentences = sentences.slice(i, i + 3).map(s => s.trim() + '.').join(' ');
        let paragraph = `<p>${paragraphSentences}</p>`;
        result.push(paragraph);
    }

    document.getElementById('output').innerHTML = result.join('\n');
}