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 PyPy3 (7.3.0) (judge verdict: Accepted)

import sys
s = sys.stdin.readline().rstrip("\n")
t = sys.stdin.readline().rstrip("\n")
l = len(s)-len(t)+1
ans = 10000000000
for i in range(l):
    s_ = s[i:i+len(t)]
    ans_ = 0
    for j in range(len(t)):
        if t[j] != s_[j]:
            ans_ += 1
    ans = min(ans,ans_)
print(ans)