export function mostFrequentChar(text: string): string {
  let counter = {};

  for(let i = 0; i < text.length;i++){
    const char = text[i];

    if(counter[char]){
      counter[char] += 1;
    } else {
      counter[char] = 1;
    }
  }

  let max = 0;
  let mostFrequent = ''

  for(let key in counter) {
    const value = counter[key];

    if(value > max){
      max = value;
      mostFrequent = key;
    }
  }

  return mostFrequent;
}