function solve(input){
    let regexp = /([@#])(?<word1>[A-Za-z]{3,})\1{2}(?<word2>[A-Za-z]{3,})\1/g;
    input[0] = input[0].split(' ').join('');
    let array = [...input[0].matchAll(regexp)];
    let validPairs = [];

    for(i = 0; i < array.length ; i++){
        let firstWord = array[i].groups.word1;
        let secondWord = array[i].groups.word2;
        validPairs.push(firstWord);
        validPairs.push(secondWord);
    }

    if(validPairs.length === 0) {
        console.log(`No word pairs found!`)
    } else{
        let result = Math.round((validPairs.length-1)/2);
        console.log(`${result} word pairs found!`)
    }

    let mirrorWords = [];
    for(i = 0; i < array.length ; i++){
        let firstWord = array[i].groups.word1;
        let secondWord = array[i].groups.word2;

        if(firstWord === secondWord.split('').reverse().join('')){
            mirrorWords.push(firstWord);
            mirrorWords.push(secondWord);
        }
    }

    if(mirrorWords.length > 0){
        console.log(`The mirror words are:`);
        let output = [];
        let str = '';
        for(i = 0; i <= ((mirrorWords.length/2 + 1)); i=i+2){
        str = `${mirrorWords[i]} <=> ${mirrorWords[i+1]}`;
        output.push(str);
        }
        console.log(output.join(', '))
    }
    else{
        console.log(`No mirror words!`)
    }
}