
# slower version:

s = input()
for i in range(len(s)):
  if i%2 == 0:
    print(s[i], end = '')


# optimized version of the same code:

s = input()
ans = ''
for i in range(len(s)):
  if i % 2 == 0:
    ans += s[i]
print(ans)



# slower version:

# coding: utf-8

import sys

import numpy as np



sr = lambda: sys.stdin.readline().rstrip()

ir = lambda: int(sr())

lr = lambda: list(map(int, sr().split()))



H, W = lr()

B = np.array([list(sr()) for _ in range(H)])

A = [[1 if x == '#' else 0 for x in b] for b in B]

row = np.sum(A, axis=1)

column = np.sum(A, axis=0)

r = row != 0

c = column != 0

answer = B[r]

answer = answer[:, c].tolist()

for a in answer:

    print((''.join(a)))


# optimized version of the same code:

# coding: utf-8

import sys



sr = lambda: sys.stdin.readline().rstrip()

ir = lambda: int(sr())

lr = lambda: list(map(int, sr().split()))



H, W = lr()

A = [sr() for _ in range(H)]

B = []

for a in A:

    if '#' in a:

        B.append(a)



B = zip(*[b for b in zip(*B) if '#' in b])

for b in B:

    print(*b, sep='')

# coding: utf-8
import sys
import numpy as np

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))
H, W = lr()
B = np.array([list(sr()) for _ in range(H)])
A = [[1 if x == "#" else 0 for x in b] for b in B]
row = np.sum(A, axis=1)
column = np.sum(A, axis=0)
r = row != 0
c = column != 0
answer = B[r]
answer = answer[:, c].tolist()
for a in answer:
    print(("".join(a)))

# coding: utf-8
import sys

sr = lambda: sys.stdin.readline().rstrip()
ir = lambda: int(sr())
lr = lambda: list(map(int, sr().split()))
H, W = lr()
A = [sr() for _ in range(H)]
B = []
for a in A:
    if "#" in a:
        B.append(a)
B = zip(*[b for b in zip(*B) if "#" in b])
for b in B:
    print(*b, sep="")

-import numpy as np -B = np.array([list(sr()) for _ in range(H)]) -A = [[1 if x == "#" else 0 for x in b] for b in B] -row = np.sum(A, axis=1) -column = np.sum(A, axis=0) -r = row != 0 -c = column != 0 -answer = B[r] -answer = answer[:, c].tolist() -for a in answer: -    print(("".join(a))) +A = [sr() for _ in range(H)] +B = [] +for a in A: +    if "#" in a: +        B.append(a) +B = zip(*[b for b in zip(*B) if "#" in b]) +for b in B: +    print(*b, sep="")