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: Runtime Error)

using System;

class main{
  public static void Main(string[] args){
    string s = Console.ReadLine();
    string t = Console.ReadLine();
    int max = 0;
    int cnt = 0;
    int loopcnt = 0;
    
    for(int i = 0; i < s.Length; i ++){
      loopcnt = i;
      for(int j = 0; j < t.Length; j++){
        if(i >= j && s[i] == t[j]){
          i++;
          cnt++;
          if(i != s.Length -1 &&cnt > max) max = cnt;
          if(max == t.Length) break;
        }
        else{
          i = loopcnt;
          cnt = 0;
        }
      }
    }
    
    Console.WriteLine(t.Length - max);
  }
}