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.Linq;

namespace AtCoderBeginnerContest177
{
	class Program
	{
		static void Main(string[] args)
		{
			var source = Console.ReadLine();
			var target = Console.ReadLine();

			var result = source.Length;
			for (var i = 0; i <= source.Length - target.Length; i++)
			{
				var count = 0;
				for (var j = 0; j < target.Length; j++)
				{
					if (source[i + j] != target[j])
					{
						count++;
					}
				}
				if (result > count)
				{
					result = count;
				}
			}

			Console.WriteLine(result);
		}
	}
}