decoding
num = input()
num = num[::-1]
Final_string = ''
number = ''
for i in range(len(num)):
number = number + num[i]
if (int(number) >= 65 and int(number) <= 90) or (int(number) >= 97 and int(number) <= 122) or (int(number) == 32):
character = chr(int(number))
Final_string+=character
number = ''
print(Final_string)