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try:
frozenset
except NameError:
print("SKIP")
raise SystemExit
sets = [
frozenset(), frozenset({1}), frozenset({1, 2}), frozenset({1, 2, 3}), frozenset({2, 3}),
frozenset({2, 3, 5}), frozenset({5}), frozenset({7})
]
for s in sets:
for t in sets:
print(sorted(s), '|', sorted(t), '=', sorted(s | t))
print(sorted(s), '^', sorted(t), '=', sorted(s ^ t))
print(sorted(s), '&', sorted(t), '=', sorted(s & t))
print(sorted(s), '-', sorted(t), '=', sorted(s - t))
u = s.copy()
u |= t
print(sorted(s), "|=", sorted(t), '-->', sorted(u))
u = s.copy()
u ^= t
print(sorted(s), "^=", sorted(t), '-->', sorted(u))
u = s.copy()
u &= t
print(sorted(s), "&=", sorted(t), "-->", sorted(u))
u = s.copy()
u -= t
print(sorted(s), "-=", sorted(t), "-->", sorted(u))
print(sorted(s), '==', sorted(t), '=', s == t)
print(sorted(s), '!=', sorted(t), '=', s != t)
print(sorted(s), '>', sorted(t), '=', s > t)
print(sorted(s), '>=', sorted(t), '=', s >= t)
print(sorted(s), '<', sorted(t), '=', s < t)
print(sorted(s), '<=', sorted(t), '=', s <= t)
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