<span>For the 2nd position there will be 27 possibilities left.</span>
For the 3rd position there will be<span> 26 possibilities left</span><span>. </span> For the 4th position there will be 25 possibilities left<span>. </span> For the 5th position there will be 24 possibilities left<span>. </span> For the 6th position there will be 23 possibilities left<span>. </span> Total = 28*27*26*25*24*23 = <span>271,252,800</span>