export function mostUsedChar(text) {
    // implementar logica aqui
    const charHolder = text.toLowerCase().split('').reduce((ac,a) => (ac[a] = ac[a] + 1 || 1, ac), {});

    let max = Math.max(...Object.values(charHolder));

    return Object.entries(charHolder).reduce((ac,[k,v]) =>v === max ? ac + k : ac, '');
}