You are given a string s consisting of lowercase English letters. Extract all the characters in the odd-indexed positions and print the string obtained by concatenating them. Here, the leftmost character is assigned the index 1.
S = input()
for i in range(len(S)):
  if i % 2 == 0:
    print(S[i])

S = input()
k = ""
for i in range(len(S)):
  if i % 2 == 0:
    k += S[i]
print(k)
