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: Wrong Answer)

using System;
using System.Linq;

namespace AtCoderTutorial
{
    public class AtCoder176
    {
        public static void Main(string[] args)
        {
//            long[] HW = Console.ReadLine().Split(' ').Select(_ => long.Parse(_)).ToArray();
//            long[] C = Console.ReadLine().Split(' ').Select(_ => long.Parse(_)).ToArray();
//            long[] D = Console.ReadLine().Split(' ').Select(_ => long.Parse(_)).ToArray();

            string S = Console.ReadLine();
            string T = Console.ReadLine();
            int maxMatchNum = 0;

            if (S.Contains(T))
            {
                maxMatchNum = T.Length;
            }

            for (int i = 0; i < S.Length - T.Length; i++)
            {
                int matchNum = 0;
                char[] subS = S.Substring(i, T.Length).ToCharArray();
                char[] charT = T.ToCharArray();
                for (int j = 0; j < subS.Length; j++)
                {
                    if (subS[j] == charT[j])
                    {
                        matchNum++;
                    }
                }

                if (matchNum > maxMatchNum)
                {
                    maxMatchNum = matchNum;
                }
            }

            Console.WriteLine(T.Length - maxMatchNum);
        }
    }
}