C1111233131211111211113313331333133313232321333133313112113121111221   >>    C111123313121111121111331333133313331323232133313331311211312111122   <<    C1111233131211111211113313331333133313232321333133313112113121111223   >>      C1111233131211111211113313331333133313232321333133313112113121111222   >>