P 3 1 M,NR.157*MJ*
LATT     -1
SYMM     -Y,  X-Y,   Z
SYMM    Y-X,   -X,   Z
SYMM      Y,    X,   Z
SYMM     -X,  Y-X,   Z
SYMM    X-Y,   -Y,   Z
    0 .6666 / 0 .5 / 0 1
    SONDER: X .LE. (1+Y)/2
    SONDER: Y .LE. MIN. (1-X,X)
    P 3 1 M,NR.157*MJ*