Problem L
Backspace

Bjarki having problems

Right before Forritunarkeppni Framhaldsskólanna started, Bjarki decided to update his computer. He didn’t notice anything off until he started writing code in his favourite editor Bim (Bjarki IMproved). Usually when he uses this editor and presses backspace one letter to the left of the cursor is erased. But after the update it instead writes the letter <. He has tried all of his editors, Bmacs, Neobim, bjedit, NoteBjad++, Subjark Text, but they all seem to have this same issue. He doesn’t have the time to scour the internet to find a solution to this problem, so he decides to take matters into his own hands and just solve this.

Help Bjarki write a program that takes as input a string he wrote and prints the string as he intended to write it.

Input

The first and only line of input contains a string $S$ of length $N$ containing only lower case English letters and the symbol <.

Output

Print the string as Bjarki intended to write it. That is to say, if the string is printed letter by letter, < denotes the removal of the last printed letter as if it were a backspace.

Explanation of Sample Inputs

In the first sample Bjarki starts by writing a a which he then erases, then writes b and c but then erases the c. The output is thus b. In the next sample Bjarki writes foss but then erases the last two letters with <<, the output at this point is thus fo. He then adds to this rritun and the output is thus forritun. In the last sample he writes a and erases it immediately afterwards twice. Then finally he writes aa and ereases it with <<.

Scoring

The solution will be tested on differently hard input data and the data is divided into groups as shown in the table below. The solution will then be scored according to how many groups are solved.

a<bc<

b

foss<<rritun

forritun

a<a<a<aa<<