P N A 21,NR.33*BE*
LATT -1
SYMM     -X,  -Y,.5+Z
SYMM   .5-X,.5+Y,.5+Z
SYMM   .5+X,.5-Y,   Z
    0 .5 / 0 .5 / 0 1
    P N A 21,NR.33*BE*