import sys import re def correct(s): s = re.sub(r'(\w)\1{2,}', r'\1\1', s) # 2+转2 s = re.sub(r'(\w)\1(\w)\2', r'\1\1\2', s) # AABB转AAB return s for line in sys.stdin: a = line.split() s = a[0] if not s.isdigit(): print(correct(s))
