export function mostUsedChar(text) {
    // implementar logica aqui
    const tl = text.length;
    const freq = {};
    let maxFreq = 0;
    let maxChar;
    for (let i = 0; i < tl; ++i){
        const isPair = (text.charCodeAt(i) & 0xF800) == 0xD800;
        const c = isPair ? text.substr(i++, 2) : text[i];
        const f = (freq[c] || 0) + 1;
        freq[c] = f;
        if (f > maxFreq){
            maxFreq = f;
            maxChar = c;
        }
    }
    return maxChar
}