H. Emblems
time limit per test
1 second
memory limit per test
256 megabytes
input
standard input
output
standard output

The Buhos media team is giving emblems to every member of the community that reaches a new rank in Codeforces. In Codeforces, every user has a rank depending on their contest rating. The ranks in Codeforces are:

RankMin RatingMax Rating
$$$\color{gray}{\texttt{newbie}}$$$$$$-\infty$$$1199
$$$\color{green}{\texttt{pupil}}$$$12001399
$$$\color{teal}{\texttt{specialist}}$$$14001599
$$$\color{blue}{\texttt{expert}}$$$16001899
$$$\color{purple}{\texttt{candidate master}}$$$19002099
$$$\color{orange}{\texttt{master}}$$$21002399
$$$\color{red}{\texttt{grandmaster}}$$$2400$$$\infty$$$

Every time a member of the community participates in a contest and gets for the first time to a new rank, they get an emblem from the media team corresponding to the new rank they have achieved. Your task is to help them determine which emblem the member should get according to the results given to you.

Input

In the first line, you get a string $$$S$$$ corresponding to the cf handle of the person ($$$|S| \lt 20$$$, it only includes characters from the English alphabet), an integer $$$C$$$ corresponding to their current rating $$$(-10^9\le C\le 10^9)$$$, an integer $$$M$$$ corresponding to their max rating $$$(0\le M\le 10^9, M\ge C)$$$, and an integer $$$D$$$ corresponding to their delta from the last round $$$(-10^9\le D\le 10^9)$$$.

Output

If they achieved a new rank for the first time, print the rank they achieved. If not, print "Think about it, you can do it!"

Examples
Input
aprohACk 2098 2098 10
Output
master
Input
ahoraSoyPeor 2237 2288 -69
Output
Think about it, you can do it!
Input
demianOneTwoThree 725 725 721
Output
specialist
Input
prins 2092 2275 207
Output
Think about it, you can do it!