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>
 
using namespace std;
#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define ll long long int
#define pb push_back
#define MOD 1000000007
#define ull unsigned long long
#define all(x) (x).begin(), (x).end()
#define read(a, n) for(ll i = 0;i<n;i++) cin>>a[i];
#define debug1(x) cout<<#x<<" "<<x<<endl;
#define debug2(x,y) cout<<#x<<" "<<x<<" "<<#y<<" "<<y<<endl;
#define debug3(x,y,z) cout<<#x<<" "<<x<<" "<<#y<<" "<<y<<" "<<#z<<" "<<z<<endl;
#define FileIO freopen("input.txt","r",stdin);freopen("output.txt","w",stdout)
const int INF = 1e9 + 5;

void solve() {
	string s, t;
	cin>>s>>t;
	
	int ans = INT_MAX;
	int n = s.size();
	int p = t.size();
	for(int i = 0;i<=n-p;i++) {
		string temp = s.substr(i, p);
		int total = 0;
		for(int j = 0;j<temp.size();j++) {
			if(temp[j] != t[j]) total++;
		}
		
		if(total < ans) ans = total;
	}
	
	cout<<ans<<"\n";
}

int main()
{
	fastio;
	
	int T = 1;
	//cin>>T;
	//int tc = 1; 
	while(T--) {
		//cout<<"Case #"<<tc<<": ";
		solve();
		//tc++;
	}	
	return 0;
}