## Goal

Based on the specially formatted number `numberstring`, you need to output the number divided by two in that same special format.

The **special format rules**: a number is always represented as a string with length 19, which represents a float with 9 numbers before and 6 numbers after the decimal point. All numbers before the decimal point are comma-separated for every three digits, while all numbers after the decimal point are point-separated for every three digits. All positions not used are represented with x.

**For example**: the input xxx,x38,858.321.82x is 38858.32182. Divided by two this gives 19429.16091, so the output should be xxx,x19,429.160.91x.
Input

**Line 1**: the string `numberstring` with length 19, representing a number in special format.

Output

A string with length 19, which is the number from the input, divided by two, in special format.

Constraints

`numberstring` represents a number >= 0 and <= 999999999.999998

The last character of `numberstring` will always either be x or an even number.

Example

Input

200,000,000.000.002

Output

100,000,000.000.001