C1111233131211111211113313331333133313232321333133313332313112111   >>    C111123313121111121111331333133313331323232133313331333231311211   <<    C1111233131211111211113313331333133313232321333133313332313112113   >>      C1111233131211111211113313331333133313232321333133313332313112112   >>