C1111233131211111211113313331333133313232321333133313112133313232232123321   >>    C111123313121111121111331333133313331323232133313331311213331323223212332   <<    C1111233131211111211113313331333133313232321333133313112133313232232123323   >>      C1111233131211111211113313331333133313232321333133313112133313232232123322   >>