diff --git a/09-mostRepeatedChar/index.js b/09-mostRepeatedChar/index.js
index b113ed8..8a25df1 100644
--- a/09-mostRepeatedChar/index.js
+++ b/09-mostRepeatedChar/index.js
@@ -1,4 +1,9 @@
 export function mostUsedChar(text) {
     // implementar logica aqui
-    return ""
+    let words = {}
+    const texts = text.toLowerCase().split("").sort();
+    texts.forEach((word) => words[word] = (words[word] || 0) + 1);
+    const maxVal = Math.max(...Object.values(words));
+    const word = Object.keys(words).find((key) => words[key] === maxVal);
+    return word
 }
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