Problem: You are given strings s and t. Find one longest string that is a subsequence of both s and t.

Constraints

* s and t are strings consisting of lowercase English letters.
* 1 \leq |s|, |t| \leq 3000

Input

Input is given from Standard Input in the following format:


s
t


Output

Print one longest string that is a subsequence of both s and t. If there are multiple such strings, any of them will be accepted.

Examples

Input

axyb
abyxb


Output

axb


Input

aa
xayaz


Output

aa


Input

a
z


Output




Input

abracadabra
avadakedavra


Output

aaadara

Solution (in PYTHON3):

Solution:
s = input()
t = input()
m, n = len(s), len(t)
dp = [[0 for _ in range(n+1)] for _ in range(m+1)]

for i in range(1, m+1):
  for j in range(1, n+1):
    if s[i-1] == t[j-1]:
      dp[i][j] = dp[i-1][j-1] + 1
    else:
      dp[i][j] = max(dp[i-1][j], dp[i][j-1])

res = ''
i, j = m, n
while i > 0 and j > 0:
  if dp[i][j] == dp[i-1][j]:
    i -= 1
  elif dp[i][j] == dp[i][j-1]:
    j -= 1
  else:
    i -= 1
    j -= 1
    res = s[i] + res
print(res)