
# 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:

from sys import stdin

import numpy as np



h,w= [int(x) for x in stdin.readline().rstrip().split()]



li = [["" for i in range(w)]for j in range(h)]



for i in range(h):

    s = stdin.readline().rstrip()

    for j in range(w):

        li[i][j] = s[j]



li = np.asarray([s for s in li if s != ['.']*w]).T.tolist()

li = np.asarray([s for s in li if s != ['.']*len(li[0])]).T.tolist()



for i in li:

    s = ""

    for j in range(len(li[0])):

        s += i[j]

    print(s)

# optimized version of the same code:

from sys import stdin,setrecursionlimit

setrecursionlimit(10 ** 7)

h,w = list(map(int,stdin.readline().rstrip().split()))

li = [["" for i in range(w)]for j in range(h)]

for i in range(h):

    s = stdin.readline().rstrip()

    for j in range(w):

        li[i][j] = s[j]

lin = []

for i in li:

    if i != ["."]*w:

        lin.append(i)

out = []

for i in range(w):

    flag = True

    for j in range(len(lin)):

        if lin[j][i] == "#":

            flag = False

    if flag:

        out.append(i)



lis = []

for i in lin:

    case = []

    for j,k in enumerate(i):

        if j in out:

            continue

        case.append(k)

    lis.append(case)



for i in lis:

    print(("".join(i)))
from sys import stdin
import numpy as np

h, w = [int(x) for x in stdin.readline().rstrip().split()]
li = [["" for i in range(w)] for j in range(h)]
for i in range(h):
    s = stdin.readline().rstrip()
    for j in range(w):
        li[i][j] = s[j]
li = np.asarray([s for s in li if s != ["."] * w]).T.tolist()
li = np.asarray([s for s in li if s != ["."] * len(li[0])]).T.tolist()
for i in li:
    s = ""
    for j in range(len(li[0])):
        s += i[j]
    print(s)

from sys import stdin, setrecursionlimit

setrecursionlimit(10**7)
h, w = list(map(int, stdin.readline().rstrip().split()))
li = [["" for i in range(w)] for j in range(h)]
for i in range(h):
    s = stdin.readline().rstrip()
    for j in range(w):
        li[i][j] = s[j]
lin = []
for i in li:
    if i != ["."] * w:
        lin.append(i)
out = []
for i in range(w):
    flag = True
    for j in range(len(lin)):
        if lin[j][i] == "#":
            flag = False
    if flag:
        out.append(i)
lis = []
for i in lin:
    case = []
    for j, k in enumerate(i):
        if j in out:
            continue
        case.append(k)
    lis.append(case)
for i in lis:
    print(("".join(i)))

-from sys import stdin -import numpy as np +from sys import stdin, setrecursionlimit -h, w = [int(x) for x in stdin.readline().rstrip().split()] +setrecursionlimit(10**7) +h, w = list(map(int, stdin.readline().rstrip().split())) -li = np.asarray([s for s in li if s != ["."] * w]).T.tolist() -li = np.asarray([s for s in li if s != ["."] * len(li[0])]).T.tolist() +lin = [] -    s = "" -    for j in range(len(li[0])): -        s += i[j] -    print(s) +    if i != ["."] * w: +        lin.append(i) +out = [] +for i in range(w): +    flag = True +    for j in range(len(lin)): +        if lin[j][i] == "#": +            flag = False +    if flag: +        out.append(i) +lis = [] +for i in lin: +    case = [] +    for j, k in enumerate(i): +        if j in out: +            continue +        case.append(k) +    lis.append(case) +for i in lis: +    print(("".join(i)))