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 Python (3.8.2) (judge verdict: Accepted)

if __name__ == '__main__':

    S = list(input())
    T = list(input())

    len_s = len(S)
    len_t = len(T)

    ans = 0
    tmp = 0
    for i in range(len_s-len_t+1):
        A = S[i:i+len_t]
        for j,k in zip(A,T):
            if j == k:
                tmp+=1
        ans = max(ans,tmp)
        tmp = 0
    print(len_t-ans)