diff --git a/src/inverseRobot.js b/src/inverseRobot.js
index 4906e020..8e297134 100644
--- a/src/inverseRobot.js
+++ b/src/inverseRobot.js
@@ -7,7 +7,23 @@
 */
 
 function inverseRobot(robot) {
-  // write code here
+  const reversedRobot = {};
+  const checkValue = {};
+
+  for (const key in robot) {
+    if (robot.hasOwnProperty(key)) {
+      const value = robot[key];
+
+      if (checkValue[value]) {
+        return null;
+      }
+
+      reversedRobot[value] = key;
+      checkValue[value] = true;
+    }
+  }
+
+  return reversedRobot;
 }
 
 module.exports = inverseRobot;