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let ucwords = (str) => {
return str.toLowerCase()
.split(' ')
.map((x) => x.slice(0, 1).toUpperCase() + x.slice(1, x.length))
.join(' ');
let tes = ucwords("loReM iPsum DolOr SIt aMet");
console.log(tes); // result: "Lorem Ipsum Dolor Sit Amet"
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