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.ComponentModel;
using System.Linq;
using System.Runtime.InteropServices.ComTypes;


class Program
{
    static void Main(string[] args)
    {
        string s = crS();
        string t = crS();
        int sLen = s.Length;
        int tLen = t.Length;
        int min = 10000;
        for(int i = 0; i < sLen - tLen + 1; i++)
        {
            string bubun = s.Substring(i, tLen);
            int count = 0;
            for(int j = 0; j < tLen; j++)
            {
                if (bubun[j] != t[j]) count++;
            }
            min = Math.Min(min, count);
        }
        Console.WriteLine(min) ;
    }




    //入力受け取り用
    static string crS() { return Console.ReadLine(); }
    static int crI() { return int.Parse(Console.ReadLine()); }
    static int[] arrInt() { return Console.ReadLine().Split(' ').Select(v => int.Parse(v)).ToArray(); }
    static long[] arrLong() { return Console.ReadLine().Split(' ').Select(v => long.Parse(v)).ToArray(); }
    static string[] arrStr() { return Console.ReadLine().Split(' ').ToArray(); }
    static List<int[]> mapInt(int h)
    {
        List<int[]> mapInt = new List<int[]>();
        for (int i = 0; i < h; i++)
        {
            mapInt.Add(arrInt());
        }
        return mapInt;
    }

    static List<string[]> mapStr(int h)
    {
        List<string[]> mapStr = new List<string[]>();
        for (int i = 0; i < h; i++)
        {
            mapStr.Add(arrStr());
        }
        return mapStr;
    }

    static List<char[]> mapChar(int h)
    {
        List<char[]> mapChar = new List<char[]>();
        for (int i = 0; i < h; i++)
        {
            string s = crS();
            mapChar.Add(s.ToCharArray());
        }
        return mapChar;
    }

    static List<char[]> mapCharCopy(List<char[]> map)
    {
        List<char[]> copyMap = new List<char[]>();
        foreach (var arr in map)
        {
            List<char> list = new List<char>();
            foreach (var ele in arr)
            {
                list.Add(ele);
            }
            copyMap.Add(list.ToArray());
        }
        return copyMap;
    }
}