View difference between Paste ID: PrBipmA0 and Xwn8YSkc

 function solve(input = []) {
   let pattern = /(@|#)(?<partOne>[A-Za-z]{3,})\1\1(?<partTwo>[A-Za-z]{3,})\1/g;
   let text = input.shift();
   let valids = pattern.exec(text);
   let validsCounter = 0;
   let mirrorPairs = [];
   let hasValids = false;
 
   while (valids) {
     hasValids = true;
     let partOne = valids[2];
     let partTwo = valids[3];
     let partTwoReversed = valids[3].split("").reverse().join("");
     let currentMirrorPair = "";
 
     if (partOne === partTwoReversed) {
       currentMirrorPair = partOne + " <=> " + partTwo;
       mirrorPairs.push(currentMirrorPair);
     }
     validsCounter++;
     valids = pattern.exec(text);
   }
 
   if (!hasValids) {
     console.log("No word pairs found!");
   } else {
     console.log(`${validsCounter} word pairs found!`);
   }
 
   if (mirrorPairs.length === 0) {
     console.log("No mirror words!");
   } else {
     console.log("The mirror words are:");
     console.log(mirrorPairs.join(", "));
   }
 }