You have a number $$$x$$$. This number is too large, and you would like to write it in a shortened form. For the sake of unambiguity, you have decided to introduce rules for shortening any non-negative number as follows:

• The shortened form of the number consists of no more than $$$4$$$ characters.
• If the number $$$x \lt 1000$$$, then its shortened form is the same as the full one, otherwise the shortened form consists of the number $$$a$$$ (possibly a real number) and the character $$$c$$$ (one of K, M, B), indicating the power of ten: K – thousand, M – million, B – billion. The value of the shortened notation is called the number $$$y$$$, equal to $$$a$$$ multiplied by the corresponding power of ten, depending on the character $$$c$$$.
• The digits of the shortened form match the first digits of the full form.
• Out of all possible variants, the shortened form of $$$x$$$ is the one whose value does not exceed $$$x$$$ and is closest to $$$x$$$. If there are several such forms, the shortest one is chosen (see examples).

Write the number in its shortened form!