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++ (GCC 9.2.1) (judge verdict: Accepted)

#include <bits/stdc++.h>
#include <string>
using namespace std;


int main(){
    int ans = 1001, a, b;
    string s, t;
    cin >> s >> t;
    int sl = s.length(), tl = t.length();

    for ( int i = 0; i < sl - tl + 1; i++){
        a = 0;
        for (int j = 0; j < tl; j++){
            if(s.at(i + j) == t.at(j)) a++;
        }
        ans = min(ans, tl - a);
    }

    cout << ans << endl;

}