P 4 B M,NR.100*CS,CZ*
LATT  -1
SYMM  -X,-Y,Z
SYMM  0.5+X,0.5-Y,Z
SYMM  0.5-X,0.5+Y,Z
SYMM  -Y,X,Z
SYMM  Y,-X,Z
SYMM  0.5+Y,0.5+X,Z
SYMM  0.5-Y,0.5-X,Z
    0 .5 / 0 .5 / 0 1
    SONDER: Y .LE. .5-X
    P 4 B M,NR.100*CS,CZ*