# 03. Characters in Range
def chars_in_range(start, end):
    return " ".join([chr(x) for x in range(ord(start) + 1, ord(end))])


first_char = input()
second_char = input()
print(chars_in_range(first_char, second_char))
7d559cf1af83362838c8a58809b394bfeef94754
<mask token>

def chars_in_range(start, end):
    return ' '.join([chr(x) for x in range(ord(start) + 1, ord(end))])


<mask token>

def chars_in_range(start, end):
    return ' '.join([chr(x) for x in range(ord(start) + 1, ord(end))])


<mask token>
print(chars_in_range(first_char, second_char))

def chars_in_range(start, end):
    return ' '.join([chr(x) for x in range(ord(start) + 1, ord(end))])


first_char = input()
second_char = input()
print(chars_in_range(first_char, second_char))

# 03. Characters in Range
def chars_in_range(start, end):
    return " ".join([chr(x) for x in range(ord(start) + 1, ord(end))])


first_char = input()
second_char = input()
print(chars_in_range(first_char, second_char))