Petya studies in a school and he adores Maths. His class has been studying arithmetic expressions. On the last class the teacher wrote three positive integers a, b, c on the blackboard. The task was to insert signs of operations '+' and '', and probably brackets between the numbers so that the value of the resulting expression is as large as possible. Let's consider an example: assume that the teacher wrote numbers 1, 2 and 3 on the blackboard. Here are some ways of placing signs and brackets: 1+23=7 1(2+3)=5 123=6 (1+2)3=9

Note that you can insert operation signs only between a and b, and between b and c, that is, you cannot swap integers. For instance, in the given sample you cannot get expression (1+3)*2.

It's easy to see that the maximum value that you can obtain is 9.

Your task is: given a, b and c print the maximum value that you can get.

-----Input-----

The input contains three integers a, b and c, each on a single line (1 ≤ a, b, c ≤ 10).

-----Output-----

Print the maximum value of the expression that you can obtain.

-----Examples-----

Input 1 2 3

Output 9

Input 2 10 3

Output 60