# index_permu.py

# index_permu.py

def index_permu(alist, index):
    alist = alist[:]
    for i in range(len(alist)-1):
        index, j = divmod(index, len(alist)-i)
        alist[i], alist[i+j] = alist[i+j], alist[i]
    return alist

i = 0
ttt = []
while 1:
    t = index_permu([9,8,7,2,3,1], i)
    if t not in ttt:
        ttt += [t]
        print (t)
        i += 1
    else:
        break