C1111233131211111211113313331333133313232321333133313121111331321121121   >>    C111123313121111121111331333133313331323232133313331312111133132112112   <<    C1111233131211111211113313331333133313232321333133313121111331321121123   >>      C1111233131211111211113313331333133313232321333133313121111331321121122   >>