C1111233131211111211113313331333133313232321333133313121111331313113221   >>    C111123313121111121111331333133313331323232133313331312111133131311322   <<    C1111233131211111211113313331333133313232321333133313121111331313113223   >>      C1111233131211111211113313331333133313232321333133313121111331313113222   >>