function solve(input) {
    let username = input.shift();
    let opiti = 0;
    for (let word of input) {
        let password = '';
        for (let i = word.length - 1; i >= 0; i--) {
            password += word[i];
        }
        if (opiti === 3) {
            console.log(`User ${username} blocked!`)
            break;
        }
        if (username === password) {
            console.log(`User ${username} logged in.`)
        } else if (username !== password) {
            opiti++;
            console.log(`Incorrect password. Try again.`)
        }
        password = '';

    }
}