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{} (1 {a, b, c, d, e} (1 2 {b, c, e} (1, 2,3 {b, c, e} (1, 2, 3, 4 {c} (1,…
{}
(
1 {a, b, c, d, e}
,
2 {b, c, e, f}
,
3 {b, c, d, e}
,
4 {a, c}
,
5 {b, d}
)