Average value#10051

Average value

1 second

64 megabytes

Very easy

Given three integers $N$ , $K$ , $M$ , identify the position (starting from $1$ ) of the number that is neither the maximum nor the minimum among them. If no such number exists, output 0.

- 1 0^{18} \leq N, K, M \leq 1 0^{18}

-10^{18} \leq N, K, M \leq 10^{18}

Input

The input consists of three numbers: $N$ , $K$ , and $M$ , separated by spaces.

Output

Output a single line with the answer to the problem.

Examples

Example 1

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Example 2

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Example 3

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- 1 0^{18} \leq N, K, M \leq 1 0^{18}