C11111211113313112113313331333133313331333132313231333133313331312111133221211   >>    C1111121111331311211331333133313331333133313231323133313331333131211113322121   <<    C11111211113313112113313331333133313331333132313231333133313331312111133221213   >>      C11111211113313112113313331333133313331333132313231333133313331312111133221212   >>