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 Lua (Lua 5.3.5) (judge verdict: Accepted)

local s=io.read()
local t=io.read()
local min=math.maxinteger
for i=1,#s-#t+1 do
    local ss=s:sub(i,i+#t-1)
    local counter=0
    for j=1,#t do
        if ss:byte(j)~=t:byte(j) then
            counter=counter+1
        end
    end
    min=math.min(counter,min)
end
print(min)