I am a 4-digit number between 6400 and 6900. The digit in the hundreds place is 3 more than the digit in the ones place. The digit in the ones place is 5 less than the digit in the tens place. The digit in the tens place is the greatest 1-digit number. <hr> I am <input min="0" type="number" id ="imp3pg013q4_1" class="lineinput" placeholder="?" />.