C1111233131211111211113313331333133313232321333133313331312212111111332313231   >>    C111123313121111121111331333133313331323232133313331333131221211111133231323   <<    C1111233131211111211113313331333133313232321333133313331312212111111332313233   >>      C1111233131211111211113313331333133313232321333133313331312212111111332313232   >>