rstList = []

for el1 in range (6):
    for el2 in range (6):
        for el3 in range (6):
            for el4 in range (6):
                for el5 in range (6):
                    for el6 in range (6):
                        if (el1 != el2 and el1 != el3 and el1 != el4 and el1 != el5 and el1 != el6 and el2 != el3 and el2 != el4 and el2 != el5 and el2 != el6 and el3 != el4 and el3 != el5 and el3 != el6 and el4 != el5 and el4 != el6 and el5 != el6):
                            if not ([[el1], [el2], sorted([el3, el4, el5, el6])] in rstList) and ([[el2], [el1], sorted([el3, el4, el5, el6])]):
                                rstList.append([[el1], [el2], sorted([el3, el4, el5, el6])])

print (rstList)