Replace Repeating Chars

# text = [x for x in input()]
#
# for i in range(len(text) - 3, - 1, -1):
#     previous = text[i + 1]
#     current = text[i]
#     if previous ==  current:
#         text.remove(text[i])
#
# print(''.join(text))


text = [x for x in input()]

for i in range(len(text) - 2, -1, -1):
    if text[i] == text[i + 1]:
        text.remove(text[i])

print(''.join(text))

text = [x for x in input()]

for i in range(len(text) - 2, -1, -1):
    # if i == 0 and text[i] != text[i + 1]:
    #     break
    if text[i] == text[i + 1]:
        text.pop(i)

print(''.join(text))