AtCoder Beginner Contest 111

Kurohashi has never participated in AtCoder Beginner Contest (ABC).

The next ABC to be held is ABC N (the N-th ABC ever held). Kurohashi wants to make his debut in some ABC x such that all the digits of x in base ten are the same.

What is the earliest ABC where Kurohashi can make his debut?

Constraints

• 100 \leq N \leq 999
• N is an integer.

Input

Input is given from Standard Input in the following format:

N

Output

If the earliest ABC where Kurohashi can make his debut is ABC n, print n.

Examples

Input

111

Output

111

Input

112

Output

222

Input

750

Output

777

inputFormat

Input

Input is given from Standard Input in the following format:

N

outputFormat

Output

If the earliest ABC where Kurohashi can make his debut is ABC n, print n.

Examples

Input

111

Output

111

Input

112

Output

222

Input

750

Output

777

样例

750

777