Can any one explain me the output of the above code?

Question

Output of the above code is Match 2 and Match 4

Can anybody explain me why it is not showing output as Match 1 ?
https://code.sololearn.com/cyzfo090YCH1/?ref=app

Answer 1

(--) is two hyphen
? is optional

so the RegEx is either two hyphen or nothing between ice and cream