var readline = require('readline');

var length = 7;
var tried = 0;

var answer = [];
for (let i = 0; i < length; i++) {
  answer.push(Math.floor(Math.random() * 10).toString());
}

const rl = readline.createInterface({
  input: process.stdin
});

rl.on('line', (line) => {
  if (!line.match(new RegExp('^\\d{' + length + ',' + length + '}$'))) {
    return console.log(`請輸入 ${length} 位的數字（可重複）`);
  }

	tried++;

  var temp = line.split('');
  var used = {};

  var a = 0;
  var b = 0;

  for (let i = 0; i < length; i++) {
    if (temp[i] === answer[i]) {
      a++;
    } else if (answer.indexOf(temp[i]) >= 0) {
      b++;
    }
  }

  console.log(a + ' a ' + b + ' b（已嘗試 ' + tried + '次）');
  if (a === length) {
    console.log('正確答案！！！');
    process.exit(0);
  }
})

console.log(`請輸入 ${length} 位的數字（可重複）`);