Problem:
Score : 200 points

Problem Statement

Given are two strings S and T.

Let us change some of the characters in S so that T will be a substring of S.

At least how many characters do we need to change?

Here, a substring is a consecutive subsequence. For example, xxx is a substring of yxxxy, but not a substring of xxyxx.

Constraints

The lengths of S and T are each at least 1 and at most 1000.

The length of T is at most that of S.

S and T consist of lowercase English letters.

Input

Input is given from Standard Input in the following format:

S
T

Output

Print the minimum number of characters in S that need to be changed.

Sample Input 1

cabacc
abc

Sample Output 1

1

For example, changing the fourth character a in S to c will match the second through fourth characters in S to T.

Since S itself does not have T as its substring, this number of changes - one - is the minimum needed.

Sample Input 2

codeforces
atcoder

Sample Output 2

6

Solution in Java (OpenJDK 11.0.6) (judge verdict: Wrong Answer)

import java.util.Scanner;

public class Main {

	public static void main(String[] args){

		Scanner sc = new Scanner(System.in);

		char[] s = sc.next().toCharArray();
		char[] t = sc.next().toCharArray();

		int ans = t.length;

		for(int i = 0; i < s.length - t.length; i++) {
			int diff = 0;
			for(int x = 0; x < t.length; x++) {
				if(t[x] != s[i+x]) {
					diff++;
				}
			}
			ans = ans <= diff ? ans : diff;
		}

		System.out.println(ans);
	}
}