Problem Statement

There is a string S consisting of digits 1, 2, ..., 9.
Lunlun, the Dachshund, will take out three consecutive digits from S, treat them as a single integer X and bring it to her master. (She cannot rearrange the digits.)
The master's favorite number is 753. The closer to this number, the better.
What is the minimum possible (absolute) difference between X and 753?

Input

Input is given from Standard Input in the following format:
S

Output

Print the minimum possible difference between X and 753.

Constraints

• S is a string of length between 4 and 10 (inclusive).
• Each character in S is 1, 2, ..., or 9.

Sample Input 1

1234567876

Sample Output 1

34

Taking out the seventh to ninth characters results in X = 787, and the difference between this and 753 is 787 - 753 = 34. The difference cannot be made smaller, no matter where X is taken from.
Note that the digits cannot be rearranged. For example, taking out 567 and rearranging it to 765 is not allowed.
We cannot take out three digits that are not consecutive from S, either. For example, taking out the seventh digit 7, the ninth digit 7 and the tenth digit 6 to obtain 776 is not allowed.

Sample Input 2

35753

Sample Output 2

0

If 753 itself can be taken out, the answer is 0.

Sample Input 3

1111111111

Sample Output 3

642

No matter where X is taken from, X = 111, with the difference 753 - 111 = 642.

见题面 Input 部分

见题面 Output 部分