Meta | Phone Screen | E5 | Reject

Mock interview.
Interviewer provided some tips and Interview was interactive.
Questions 1 was Count and Say - https://leetcode.com/problems/count-and-say/description/
Question 2 was Stickers to spell word https://leetcode.com/problems/stickers-to-spell-word/description/

Phone Screen
Interviewer was unwilling to provide any tips and was not interactive
Question 1 : Implement the operations of the data structure defined
public interface DataStructure<T> {
void put(T t);
void remove(T t);
boolean contains(T t);
List<T> getItemsInOrderOfInsertion();
}
Question 2 : I could not find on leetcode but looks like :
"one" -> 1
"twenty three" -> 23
"four hundred fifty six" -> 456
"eighty one million one hundred three thousand ten" -> 81,103,010

Got feedback on the 2nd day I could not move forward.