# Author:  James Tam
# Version: July 16, 2020

str1 = input("Enter a series of lower case alphabetic characters: ")
endString = False
i = 0
while (endString == False):
    temp = str1[i]
    if ((temp < "a") or (temp > "z")):
        endString = True
    else:
        print(temp)
        i = i + 1
print("Done")