F D 3,NR.203*BE,GC*
LATT 4
SYMM     X, .25-Y, .25-Z
SYMM .25-X,     Y, .25-Z
SYMM .25-X, .25-Y,     Z
SYMM     Z,     X,     Y
SYMM     Z, .25-X, .25-Y 
SYMM .25-Z,     X, .25-Y
SYMM .25-Z, .25-X,     Y
SYMM     Y,     Z,     X
SYMM     Y, .25-Z, .25-X
SYMM .25-Y,     Z, .25-X
SYMM .25-Y, .25-Z,     X
    -.125 .375 / -.125 .125 / -.375 .125
    SONDER: Y .LE. MIN. (X,.25-X)
    SONDER: -Y-.25 .LE. Z .LE. Y
    F D 3,NR.203*BE,GC*