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)

import sys

# B - Substring
def count(substring):
  global T
  global t
  c = 0

  for i in range(t):
    if T[i] != substring[i]:
      c += 1

  return c


S = input()
T = input()

s = len(S)
t = len(T)
ans = t

for i in range(s-t+ 1):
  substring = S[i:i+t]
  ans = min(ans, count(substring))

print(ans)