CF253A.Boys and Girls

There are $n$ boys and $m$ girls studying in the class. They should stand in a line so that boys and girls alternated there as much as possible. Let's assume that positions in the line are indexed from left to right by numbers from 1 to $n+m$ . Then the number of integers $i$ ( 1<=i<n+m ) such that positions with indexes $i$ and $i+1$ contain children of different genders (position $i$ has a girl and position $i+1$ has a boy or vice versa) must be as large as possible.

Help the children and tell them how to form the line.

The single line of the input contains two integers $n$ and $m$ ( $1<=n,m<=100$ ), separated by a space.

Print a line of $n+m$ characters. Print on the $i$ -th position of the line character "B", if the $i$ -th position of your arrangement should have a boy and "G", if it should have a girl.

Of course, the number of characters "B" should equal $n$ and the number of characters "G" should equal $m$ . If there are multiple optimal solutions, print any of them.

In the first sample another possible answer is BGBGBG.

In the second sample answer BBGBGB is also optimal.