You are given an integer N. Among the integers between 1 and N (inclusive), how many Shichi-Go-San numbers (literally "Seven-Five-Three numbers") are there?
Here, a Shichi-Go-San number is a positive integer that satisfies the following condition:
- When the number is written in base ten, each of the digits 7, 5 and 3 appears at least once, and the other digits never appear.

-----Constraints-----
- $1 \leq N < 10^9$
- N is an integer.

-----Input-----
Input is given from Standard Input in the following format:
N

-----Output-----
Print the number of the Shichi-Go-San numbers between 1 and N (inclusive).

-----Sample Input-----
575

-----Sample Output-----
4

There are four Shichi-Go-San numbers not greater than 575: 357, 375, 537 and 573.

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