#681. Sums of groups of 3
Split the list into groups of 3 elements in a row (the last group may be smaller). Print the sum of each group.
### Input
The first line has n, the second line has n integers separated by spaces.
### Output
One line.
Examples
Input
11 -4 -4 6 -3 3 1 5 3 -9 2 -6
Output
-2 1 -1 -4
Input
11 -1 0 4 2 10 8 -7 -5 -2 7 -6
Output
3 20 -14 1
💡 You can solve it with Python, JavaScript or blocks. Read the input line by line with input(). Don't print a question (like input("Number: ")). Print exactly what the output asks for, nothing more.