Given a string S consisting of 2 words reverse the order of two words .

Given a string S consisting of 2 words reverse the order of two words .
Input Size : |S| <= 10000000
Sample Testcase :
INPUT
hello world
OUTPUT
world hello


const readline = require('readline');
 const inp = readline.createInterface({
  input: process.stdin
 });
 const userInput = [];
 inp.on("line", (data) => {
 userInput.push(data);
 });
 inp.on("close", () => {
 var data = userInput[0].split(" ");
 var a = data.reverse();
 var c= a.join(" ");
console.log(c)
});

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