login

function solve(arr){
    let username = arr[0];
    let password = '';

    for (let i = username.lenght-1; i>=0; i--){
        password += username[i];
    }
    let counter = 1;
    for (let i=1; i <= arr.lenght - 1; i++, counter++){
        let currentUsername = arr[i];
        if (curreuntUsername === password){
            console.log(` User ${username} logged in.`);
            return;

        }
     if (counter === 4){
        console.log(`User ${username} blocked!`);
        break;
    } else {
        console.log(`Incorrect password. Try again.`);
    }
}
}
solve(['Acer','login','go','let me in','recA']);