[ String ] object

☞ x ≔ List ← 1 ; 2 ; 3.
☞ a ≔ x string.
☞ b ≔ a object.
✎ write: a type, stop.
✎ write: a, stop.
✎ write: b type, stop.
✎ write: b, stop.
String
List ← 1 ; 2 ; 3
List
List ← 1 ; 2 ; 3