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.
line = input()
count = len(line)
if count % 2 == 0:
  for i in range(0 ,count - 1 ,2):
    print(line[i],end =" ")
else:
  for i in range(0 ,count ,2):
    print(line[i],end ="")
line = input()
answer = line[::2]
print(answer)