195928

So I started with one so I started with 1234 becuase it was easy and easy to think and then I thought I had to be more specific so I did 3214 which was more better than 1234 and then I thought more so I wrote 1432 then 2314 then 2143 after writing all the 1 solutions I moved on to 2 soluotions then i organise them in columns 1 2 3 4 on the whiteboard and I figured out aa idea each row will have a different numbers and then I finished them off.