[(“a”, “b”), (“a”, “c”), (“a”, “d”), (“b”, “e”), (“f”, “e”), (“g”, “h”)]

Input S1: “a e g” S2: “f c h”
Map: [(“a”, “b”), (“a”, “c”), (“a”, “d”), (“b”, “e”), (“f”, “e”), (“g”, “h”)]
Output: True