Yuanfang，what do you think ?
Now,we know that Yuanfang is the best student in the class. Every time when the teacher comes up with a hard problem and it seems no student can solve it, He always says: "Yuanfang , what do you think?".
Today, They had another math class,(why always math class?)The teacher said:”Let’s calculate the sum of A+B,but there are something different ,the two integers A and B are very very large,Yuanfang, what do you think?"
Yuanfang wanted to solve this problem quickly. So he came to you again, the only programmer he knows, for help.
You should write a program to calculate A+B to help him.
Each case has two integers A and B(0≤A,B≤10^60)in a line.