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