As you might already know, Ada the Ladybug has a huge TODO-list. Sometimes she inserts a new job into her TODO-list and sometimes she is wondering whether there is a job (in her TODO-list), which she wants to do now. She doesn't require the whole job to be there, perhaps just a part of it.

Can you create a program which would serve her? That means it either inserts a new job into her TODO-list or answers whether there exists a word (in her TODO-list) which is a substring of given word.

Input

The first line of input containts Q, the number of queries.

The next Q lines contains a number 0 ≤ t ≤ 1 and nonempty string s. If t is equal to 0 then it is inserion query, otherwise it is question query. s consists of lowercase characters only.

The sum of lengths of queries of both types doesn't exceed 10⁶ (that means the total sum of lengths of strings will be at most 2*10⁶)

Output

For each query of type 1, print either YES, if there is already a substring in the TODO-list and NO otherwise.

Example Input

12
0 cat
1 dogville
0 dog
1 dogville
1 gooutwithcat
1 gooutwithcrocodile
1 fancyconcatenation
0 crocodile
1 lacoste
1 gooutwithcrocodile
1 catalanreferendum
1 rocodile

Example Output

NO
YES
YES
NO
YES
NO
YES
YES
NO