Vedant really wants the recruiters at a certain internet search company to know how much he wants to work there, so he adds a bunch of cute hearts at the end of his resume.
A cute heart is defined as one of the following:
<3
is a cute heart<x3
, wherex
is a cute heartxy
, wherex
andy
are cute hearts
For example, <<<333
, <<3<33
, <3<3
and <<<<3<33<333
are all cute hearts, but <<3
,
<33<
and 3<3<
are not cute hearts.
Help Vedant figure out whether the text he added to his resume is a cute heart!
Input
The input is a single string with no more than characters, with each character being
either <
or 3
.
Output
Output <3
if the text is a cute heart, and </3
otherwise.
Sample Input 1
<<<33<33
Sample Output 1
<3
Explanation for Sample Input 1
All the hearts are nested correctly within each other.
Sample Input 2
<3<<<3333
Sample Output 2
</3
Explanation for Sample Input 2
The last character, 3
, is not matched with a <
, so it can't be a cute heart.
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