**Problem**

Do you think "A+B
Problem" is the easiest problem you have solved.
Now I give you another easy problem named "Sum". You are to calculate
the sum of 5 numbers, and output the
answer accurate to three fractional digits.

Note: It is an easy task, but please be careful!

**Input
**5 numbers a line. A line containing 5 zeroes ends the input. The absolute value of all the numbers
are smaller than 10.

**Output**

For every line except the last,
output the sum, one in a line.

Sample Input

1 2 3 4 4

0 1 2 3 4

1 -1 0 0 -0.0004

0 0 0 0
0

**Sample Output
**14.000

10.000

0.000

**Author: magicpig**