
# 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:

n = int(eval(input()))

a = [int(x) for x in input().split()]



ans = list(range(n))



for i in range(n):

    ans[a[i]-1] = i+1

    

print((' '.join(map(str,ans))))

# optimized version of the same code:

def main():



    N = int(eval(input()))

    A = list(int(x) for x in input().split())

    ans = [0] * N



    for i, a in enumerate(A):

        ans[a-1] = i+1



    print((' '.join(map(str, ans))))

    

if __name__ == '__main__':

    main()
n = int(eval(input()))
a = [int(x) for x in input().split()]
ans = list(range(n))
for i in range(n):
    ans[a[i] - 1] = i + 1
print((" ".join(map(str, ans))))

def main():
    N = int(eval(input()))
    A = list(int(x) for x in input().split())
    ans = [0] * N
    for i, a in enumerate(A):
        ans[a - 1] = i + 1
    print((" ".join(map(str, ans))))


if __name__ == "__main__":
    main()

-n = int(eval(input())) -a = [int(x) for x in input().split()] -ans = list(range(n)) -for i in range(n): -    ans[a[i] - 1] = i + 1 -print((" ".join(map(str, ans)))) +def main(): +    N = int(eval(input())) +    A = list(int(x) for x in input().split()) +    ans = [0] * N +    for i, a in enumerate(A): +        ans[a - 1] = i + 1 +    print((" ".join(map(str, ans)))) + + +if __name__ == "__main__": +    main()