*HEADING
 SKEW-SENSITIVITY ANALYSIS, 45 DEG PARALLELOGRAM, C3D20R, 1 X 8 MESH 
*NODE,NSET=SIDE1
1,0.,0.
2,0.325,0.
3,.65,0.
15,5.15,0.
16,5.575,0.
17,6.,0.
401,0.,.1
417,6.,.1
801,0.,.2
802,0.425,.2
803,.85,.2
815,5.35,.2
816,5.675,.2
817,6.,.2
*NODE,NSET=SIDE2
2001,0.,0.,.01
2002,0.325,0.,.01
2003,.65,0.,.01
2015,5.15,0.,.01
2016,5.575,0.,.01
2017,6.,0.,.01
2401,0.,.1,.01
2417,6.,.1,.01
2801,0.,.2,.01
2802,0.425,.2,.01
2803,.85,.2,.01
2815,5.35,.2,.01
2816,5.675,.2,.01
2817,6.,.2,.01
*NGEN,NSET=SIDE1
2,16
401,417
802,816
*NGEN,NSET=SIDE2
2003,2015
2401,2417
2803,2815
*NFILL
SIDE1,SIDE2,2,1000
*NSET,NSET=FIX
1,401,801,1001,1801,2001,2401,2801,
*ELEMENT,TYPE=C3D20R
1, 1,2001,2003,3, 801,2801,2803,803, 1001,2002,1003,2, 1801,2802,1803,
802, 401,2401,2403,403
*ELGEN,ELSET=EALL
1,8,2,1
*MATERIAL,NAME=A1
*ELASTIC
1.E8,0.3
*SOLID SECTION,MATERIAL=A1,ELSET=EALL
*STEP,PERTURBATION
*STATIC
*BOUNDARY
SIDE1,3
FIX,1,3
*CLOAD
17,2,-.25
817,2,-.25
2017,2,-.25
2817,2,-.25
*EL PRINT
COORD, 
S, 
E, 
*NODE FILE
U, 
*OUTPUT,FIELD
*NODE OUTPUT
U,
*END STEP