1 2 3 4
E H H H
* T X T
  * v X
    * v
      *
handedness 1 2 3 L
handedness 1 2 4 L
handedness 1 3 4 L
handedness 2 3 4 R
length 1 E 5 100
length 2 H 8 100
length 3 H 8 100
length 4 H 8 100