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 C# (.NET Core 3.1.201) (judge verdict: Accepted)

using System;
using System.Collections.Generic;
using System.Text;

class Program
{
	static void Main(string[] args)
	{
		string[] input = Read();
		char[] s = input[0].ToCharArray();
		input = Read();
		char[] t = input[0].ToCharArray();

		int max = 0;
		for(int i = 0; i <= s.Length - t.Length; i++)
		{
			int buf = 0;
			for(int j = 0; j < t.Length; j++)
			{
				if(s[i+j] == t[j]) buf++;
			}
			max = max < buf ? buf : max;
		}
		Write(t.Length - max);
	}

	static string[] Read()
	{
		return Console.ReadLine().Split(' ');
	}

	static void Write(object o)
	{
		Console.WriteLine(o.ToString());
	}
}