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