High-Precision Addition

This problem requires you to perform high-precision addition on two non-negative integers, provided as strings. You should compute the sum of the inputs. The operation is essentially the standard addition (a + b) but must handle arbitrarily large numbers that cannot be represented using primitive data types.

Note: Negative numbers are not considered in this problem.

inputFormat

The input consists of a single line containing two non-negative integers separated by whitespace. These integers may be very large.

outputFormat

Output a single line containing the sum of the two integers.

sample

123 456

579