C1111233131211111211113313231333133313331323331333133313232213221   >>    C111123313121111121111331323133313331333132333133313331323221322   <<    C1111233131211111211113313231333133313331323331333133313232213223   >>      C1111233131211111211113313231333133313331323331333133313232213222   >>