Vs title tsubame

Excavation Game

Your team is building an excavation game where users won rewards when the users excavate OOPArts. You are building a module to calculate the rewards.

The procedure to calculate the amounts of rewards offered of is as follows.

First, you are given random double digits "N". The amounts of rewards offered of, "R", are calculated as: R = N + (tens place of "N") + (ones place of "N")

The amount for the random digits "27" is calculated as follows:
Figure tsubame 1
You are given a random double digits "N". Find the amounts of reward offered of, "R".
ミッション1

Find the amounts of reward offered of, "R".

Input

Input is given in the following format:
N

Constraints

All test cases have the following constraints:
10 ≦ N ≦ 99

Output

Output the amounts of the the rewards offered of, "R".
Add a newline character at the end of the output. Do not include any unnecessary characters or empty lines.
Input example 1
27
Output example 1
36
Input example 2
97
Output example 2
113

Answer

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