00:01
All right, so we're starting some permutations in lexicographic order, which is really just the ordinary order, right, if we order them as numbers.
00:10
So our first, we'll first look at the first digit, which is 1 for those two exactly, and then this one starts 1, 4, this one starts 1, 5.
00:20
So we'll start out with 1, 4, 5, 3, 2, and 1, 5, 4, 3, 2, and cross these out because we're done with them.
00:32
Next we'll look at all the ones that start with 2, which are these three...