K#s, Ranked

Found in my drafts
  1. 1.
    K8
    Obviously
  2. 2.
    K9
    Yay pups
  3. 3.
    KY
    Excellent (Y is a number it's a variable and an axis and maybe an intercept whatever I remember math stuff okay)
  4. 4.
    K-4
    Elementary bbs
  5. 5.
    K2
    A mountain more dangerous than Everest (same) h/t @edge
  6. 6.
    K7
    Something French
  7. 7.
    K1
    This is military related but I forget