C1111233131211111211113313331333133313331333133313331333132312323211   >>    C111123313121111121111331333133313331333133313331333133313231232321   <<    C1111233131211111211113313331333133313331333133313331333132312323213   >>      C1111233131211111211113313331333133313331333133313331333132312323212   >>