const sentences = Array.from(document.querySelectorAll("span"));

console.log(sentences);

sentences.forEach((sentence) => {
	let content = sentence.textContent.trim();

	if (content) {
		let first = content[0];
		let rest = content.substring(1);
		sentence.innerHTML = rest;

		let capital = document.createElement("span");
		capital.classList.add("first");
		capital.innerHTML = first;

		sentence.prepend(capital);
	}
});