
# 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:

a, b = list(map(int, input().split()))

if a*b%2 == 1:

    print("Odd")

else:

    print("Even")

# optimized version of the same code:

a, b = list(map(int, input().split()))

print(('Odd'if a&b&1 else 'Even'))
a, b = list(map(int, input().split()))
if a * b % 2 == 1:
    print("Odd")
else:
    print("Even")

a, b = list(map(int, input().split()))
print(("Odd" if a & b & 1 else "Even"))

-if a * b % 2 == 1: -    print("Odd") -else: -    print("Even") +print(("Odd" if a & b & 1 else "Even"))