Coderbyte – Letter Count
Have the function LetterCount(str) take the str parameter being passed and return the first word with the greatest number of repeated letters. For example: “Today, is the greatest day ever!” should return greatest because it has 2 e’s (and 2 t’s) and it comes before ever which also has 2 e’s. If there are no words with repeating letters return -1. Words will be separated by spaces.

function LetterCount(str) {
const words = str.split(' ');
let maxWord = '';
let maxCount = 1;
for (let i = 0; i < words.length; i++) {
const counts = {};
let count = 0;
for (let j = 0; j < words[i].length; j++) {
const char = words[i][j];
counts[char] = counts[char] ? counts[char] + 1 : 1;
if (counts[char] > count) {
count = counts[char];
}
}
if (count > maxCount) {
maxCount = count;
maxWord = words[i];
}
}
return maxWord || -1;
}
// keep this function call here
console.log(LetterCount(readline()));
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