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Problems

The sum of digits of a two-digit number

The sum of digits of a two-digit number

Time limit 1 second
Memory limit 64 MiB

Find the sum of digits of a given two-digit number.

Input data

In a single line given a two-digit integer.

Outout

In a single line the sum of its digits.

Examples

Input example #1
23
Output example #1
5