def comSets(U,S1,S2):
    unionS= S1.union(S2)
    unionAll=U.union(unionS)
    print(unionAll)
    interSect=U.intersection(unionS)
    print(interSect)
    differAll=U.difference(unionS)
    print(differAll)
    symDiffer=U.symmetric_difference(unionS)
    print(symDiffer)
    U={'A','B','C','D','E','F','G','H','I','J'}
    S1={'B','C','H','I'}
    S2={'A','D','E','F','J'}
    comSets(U,S1,S2)