P 6 M M,NR.183*CB*
LATT   -1
SYMM   -Y,    X-Y,   Z
SYMM    Y-X,   -X,   Z
SYMM   -X,     -Y,   Z
SYMM    Y,    Y-X,   Z
SYMM    X-Y,    X,   Z
SYMM    Y,      X,   Z 
SYMM   -X,    Y-X,   Z
SYMM    X-Y,   -Y,   Z
SYMM   -Y,     -X,   Z
SYMM    X,    X-Y,   Z
SYMM    Y-X,    Y,   Z
    0 .6666 / 0 .3333 / 0 1
    SONDER: X .LE. (1+Y)/2
    SONDER: Y .LE. X/2
    P 6 M M,NR.183*CB*