LARGEST INTEGER IN C

You are given with a string which comprises of some numbers. Your task is to find the largest integer by converting the string to the corresponding integer.

Input Description:
First line contains n denoting number of Test Cases. The first and only Line of testcase has the string

Output Description:
Print the largest number

Sample Input :
 I was born on 12 october 1998.

Sample Output :
1998

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.sort();
 var b=[]
 for(i=0;i<a.length;i++)
 {b[i]=Number(a[i])
if(b[i]===NaN)
break;

 }
 
 
 
 
 
 });