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 Ruby (2.7.1) (judge verdict: Accepted)

s = gets.chomp.split('')
t = gets.chomp.split('')

s_l = s.length
t_l = t.length
max = s_l - t_l
min_cnt = t.length

(0..max).each do |i|
  cnt = 0
  s[i..(i + t_l - 1)].each_with_index do |ele,  i|
    cnt += 1 unless ele == t[i]
  end
  min_cnt = cnt if cnt < min_cnt
end

puts min_cnt