--- (1) ---
Set(3) { 'a', 'b', 'c' }

 --- (2) ---
Set(4) { 'a', 'b', 'c', 'd' }

 --- (3) ---
Set(6) { 'f', 'i', 'r', 'e', 'o', 'x' }

 --- (4) ---
abcd

 --- (5) ---
[Set Iterator] { 'a', 'b', 'c', 'd' }

 --- (6) ---
[Set Iterator] { 'a', 'b', 'c', 'd' }

 --- (7) ---
[Set Entries] {
  [ 'a', 'a' ],
  [ 'b', 'b' ],
  [ 'c', 'c' ],
  [ 'd', 'd' ]
}

 --- (8) ---
object true

 --- (9) ---
1
5
{ a: 1, b: 2 }
{ a: 1, b: 2 }

 --- (10) ---
1
5
{ a: 1, b: 2 }
{ a: 1, b: 2 }
1
5
{ a: 1, b: 2 }
{ a: 1, b: 2 }
1
5
{ a: 1, b: 2 }
{ a: 1, b: 2 }

 --- (11) ---
[ 1, 5, { a: 1, b: 2 }, { a: 1, b: 2 } ]
4
[ 1, 2, 3, 4 ]

 --- (12) ---
1
2
3
4

 --- (13) ---
[
  2, 3,  4, 5,
  6, 7, 32
]