# This program:
# - gets a string from the user.
# - creates a new string, equal to what the user typed, except that
#   the third letter is "A".
# - prints the new string.
#
# Compared to change_third_letter.py, this is a different (but equivalent)
# implementation. The behavior is the same, but the code is much shorter
# here.

my_string = raw_input("please enter a string: ")

if (len(my_string) >= 3):
    my_string = my_string[0:2] + "A" + my_string[3:]

print "the modified string is", my_string