Tokitsukaze, CSL and Palindrome Game

Tokitsukaze is playing with CSL a game based on a string $S_{1..n}$ which only contains lowercase letters and whose length is $n$.

A string is palindromic if and only if it reads the same backward as forward, such as "madam" and "racecar". Before the game starts, Tokitsukaze will select a palindromic substring of $S$, denoted as $S_{a..b}$, and CSL will select a palindromic substring, denoted as $S_{c..d}$, too.

There is also a string $P$ that is empty at the beginning of the game. Then at every second, a character will be appended to the end of $P$ automatically, where the character is randomly chosen from all possible lowercase letters (i.e. 'a' to 'z'), each with the same probability $\frac{1}{26}$. The game ends when both $S_{a..b}$ and $S_{c..d}$ become substrings of $P$.

Let $E(S_{a..b})$ be the expected length of $P$ when $S_{a..b}$ firstly becomes a substring of $P$, and $E(S_{c..d})$ be the similar expected value for $S_{c..d}$. The winner of the game will be the one with a lower expected value for his or her choice. In case of a tie, when $E(S_{a..b})$ equals to $E(S_{c..d})$, the game is a draw.

Now, they will play this game with the same string $S$ for $q$ times, and Tokitsukaze will inform you of their choices in each game. Can you predict for her the result of each game?

There are several test cases.

The first line contains an integer $T$ $(1 \leq T \leq 25)$, denoting the number of test cases. Then follow all the test cases.

For each test case, the first line contains an integer $n$ $(1 \leq n \leq 10^5)$, denoting the length of the string $S$.

The second line contains the string $S$ consisting of only lowercase letters.

The third line contains an integer $q$ $(1 \leq q \leq 10^5)$, denoting the number of games.

In the next $q$ lines, each line contains four integers $a$, $b$, $c$ and $d$ $(1 \leq a \leq b \leq n, 1 \leq c \leq d \leq n)$, representing a game where Tokitsukaze selects $S_{a..b}$ and CSL selects $S_{c..d}$.

For each game, output in one line "sjfnb" (without quotes, the same below) if Tokitsukaze will be the winner, or "cslnb" if CSL will, or "draw" in case of a tie. Note that the output characters are case-sensitive.

1
7
abbabba
5
1 1 2 2
1 4 4 7
2 3 1 7
1 4 5 6
2 3 3 5

draw
draw
sjfnb
cslnb
sjfnb

2020 Multi-University Training Contest 3