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A. Adding Digits

time limit per test

2 secondsmemory limit per test

256 megabytesinput

standard inputoutput

standard outputVasya has got two number: *a* and *b*. However, Vasya finds number *a* too short. So he decided to repeat the operation of lengthening number *a* *n* times.

One operation of lengthening a number means adding exactly one digit to the number (in the decimal notation) to the right provided that the resulting number is divisible by Vasya's number *b*. If it is impossible to obtain the number which is divisible by *b*, then the lengthening operation cannot be performed.

Your task is to help Vasya and print the number he can get after applying the lengthening operation to number *a* *n* times.

Input

The first line contains three integers: *a*, *b*, *n* (1 ≤ *a*, *b*, *n* ≤ 10^{5}).

Output

In a single line print the integer without leading zeros, which Vasya can get when he applies the lengthening operations to number *a* *n* times. If no such number exists, then print number -1. If there are multiple possible answers, print any of them.

Examples

Input

5 4 5

Output

524848

Input

12 11 1

Output

121

Input

260 150 10

Output

-1

Codeforces (c) Copyright 2010-2017 Mike Mirzayanov

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