################################
# Accept string from the user 
# and display only those characters which are present 
# at an even index
# Enter String pynative
# Orginal String is pynative
# Printing only even index chars
# index[ 0 ] p
# index[ 2 ] n
# index[ 4 ] t
# index[ 6 ] v
# ??就這麽簡單
################################

inputstr = "pynative"
print(inputstr[::2])