6.2.1.2. Test output

     1: s1= set(3, 2, 1)
     2: s2= set(30, 20, 3, 10)
     3: s1|s2= set(10, 30, 20, 3, 2, 1)
     4: s1&s2= set(3)
     5: s1^s2= set(30, 20, 10, 1, 2)
     6: s1+s2= set(10, 30, 20, 3, 2, 1)
     7: s1-s2= set(2, 1)
     8: s1==s1= 1
     9: s1[:]= set(3, 2, 1)
    10: s1[1:-1]= set(2)
    11: s1==s2= 0
    12: s1<s2= 1
    13: s1>s2= 0
    14: s1.le(s2)= 0
    15: s1.lt(s2)= 0
    16: s1.ge(s2)= 0
    17: s1.gt(s2)= 0
    18: s1= set(9, 8, 7, 6, 5, 4, 3, 2, 1)
    19: s2= set(7, 5, 3, 9, 1)
    20: s1.le(s2)= 0
    21: s1.lt(s2)= 0
    22: s1.ge(s2)= 1
    23: s1.gt(s2)= 1