abcdefghijklmnopqrstuvwxyzzyxwvutsrqponmlkjihgfedcbaqwertyuiopasdfghjklzxcvbnm
The alphabet forwards, then the alphabet backwards, then the letters on the QWERTY keyboard in order
I was really bored that I ended up typing abcdefghijklmnopqrstuvwxyzzyxwvutsrqponmlkjihgfedcbaqwertyuiopasdfghjklzxcvbnm on my computer’s keyboard.