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